134201344

Appears in sequences

• a(n) = 2^(n+2)*(2^(n+1)-1).at n=12A059153
• Nonunitary perfect numbers: k is the sum of its nonunitary divisors; i.e., k = sigma(k) - usigma(k).at n=4A064591
• Nontrivial nonunitary multiply perfect numbers: the sum of the nonunitary divisors of n is a positive multiple of n; i.e., (sigma(n) - usigma(n))/n is a positive integer.at n=12A064595
• a(n) = Sum_{k=0..n} 2^max(k, n-k).at n=25A107659
• a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3), n > 3; a(0) = 1, a(1) = 4, a(2) = 12, a(3) = 32.at n=25A133212
• a(n) is the number of induced subgraphs with odd number of edges in the cycle graph C(n).at n=26A156232
• G.f.: (32*x^7/(1-2*x) + 16*x^5 + 24*x^6)/(1-2*x^2).at n=28A204696
• Number of bitstrings of length n (with at least two runs) where the last two runs have different lengths.at n=26A208901
• Numbers k such that k^2 XOR (k+1)^2 is a square, and k^2 XOR (k-1)^2 is a square, where XOR is the bitwise logical XOR operator.at n=19A224242
• The number of length n binary words with some prefix which contains two more 1's than 0's or two more 0's than 1's.at n=27A233411
• Numbers k such that k^2 + 1 = p*q, p < q primes and q-p is a power of 2.at n=7A238947
• Composite numbers whose sum of unitary divisors is a multiple of the sum of their aliquot parts.at n=9A273813
• 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 182", based on the 5-celled von Neumann neighborhood.at n=27A286410
• 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 493", based on the 5-celled von Neumann neighborhood.at n=26A288664
• 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 785", based on the 5-celled von Neumann neighborhood.at n=26A290414
• 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 833", based on the 5-celled von Neumann neighborhood.at n=26A290527
• 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 841", based on the 5-celled von Neumann neighborhood.at n=26A290550
• Consider the non-unitary aliquot parts, in ascending order, of a composite number. Take their sum and repeat the process deleting the minimum number and adding the previous sum. The sequence lists the numbers that after some iterations reach a sum equal to themselves.at n=26A307859
• Number of solutions of y^2 + y = x^3 + x where x and y are in GF(2^n).at n=26A362374
• Cogrowth sequence of the 16-element quasihedral group SD16 = <S,T | S^8, T^2, STS^5T>.at n=15A377885