130815

Appears in sequences

• Odd numbers k such that abs(sigma(k)-2k) <= sqrt(k). Abundance-radius = abs(sigma(k)-2k) does not exceed square root of k and k is odd.at n=35A087415
• Numbers that contain a single zero in bases 2 and 10.at n=34A118681
• Binary palindromic numbers with only one 0 bit.at n=8A129868
• Base 10 representation of A240602.at n=42A165785
• a(n) = AP(n) is the total number of aperiodic k-palindromes of n, 1 <= k <= n.at n=33A179781
• Odd numbers n such that 2n/sigma(n) - 1 = 1/x for some positive integer x.at n=30A222263
• T(n,k)=Rolling icosahedron face footprints: number of nXk 0..19 arrays starting with 0 where 0..19 label faces of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves across an icosahedral edge.at n=37A223282
• Rolling icosahedron face footprints: number of 2 X n 0..19 arrays starting with 0 where 0..19 label faces of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves across an icosahedral edge.at n=7A223283
• Array read by antidiagonals: T(m,n) read in binary is a palindrome with m runs of n ones separated by single zeros.at n=37A249544
• Decimal representation of the n-th iteration of the "Rule 203" elementary cellular automaton starting with a single ON (black) cell.at n=8A267685
• Decimal representation of the n-th iteration of the "Rule 217" elementary cellular automaton starting with a single ON (black) cell.at n=8A267812
• Main diagonal of A274637.at n=17A274638
• a(n) = (2^n - (-1+i)^n - (-1-i)^n)/4 - 1 where i is the imaginary unit.at n=18A275016
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 299", based on the 5-celled von Neumann neighborhood.at n=32A287537
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 513", based on the 5-celled von Neumann neighborhood.at n=16A288811
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 513", based on the 5-celled von Neumann neighborhood.at n=16A288812
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 515", based on the 5-celled von Neumann neighborhood.at n=16A288827
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 515", based on the 5-celled von Neumann neighborhood.at n=16A288828
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 771", based on the 5-celled von Neumann neighborhood.at n=16A290230
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 771", based on the 5-celled von Neumann neighborhood.at n=16A290231