1605632

Appears in sequences

• Expansion of (1 + 2*x)/(1 - 2*x)^3.at n=13A014477
• Numbers of form 7^i*8^j with i, j >= 0, sorted.at n=33A036566
• Second column of triangle A055584.at n=13A055585
• a(0)=1, a(1)=6, a(n)=49*8^(n-2) if n>=2.at n=7A055847
• Coefficient triangle for certain polynomials.at n=31A055858
• Fourth column of triangle A055858.at n=7A055862
• 17-almost primes (generalization of semiprimes).at n=25A069278
• a(n) is the number of occurrences of 11s in the palindromic compositions of m=2*n-1 = the number of occurrences of 12s in the palindromic compositions of m=2*n.at n=15A079863
• Numerators of terms in the Pippenger product.at n=3A084148
• a(0)=1; a(n) is the smallest positive integer such that lcm(a(n-1), a(n)) = n!.at n=16A129108
• Number of permutations of 7 indistinguishable copies of 1..n arranged in a circle with exactly 1 local maximum.at n=5A159738
• a(0)=2, a(1)=7, and a(n) = (3*n+1)*2^(n-1) if n > 1.at n=16A176662
• Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 9.at n=11A234133
• Number of n X 3 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=14A281200
• Numerator of the volume of the d-th Chern-Vaaler star body.at n=6A286523
• 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 366", based on the 5-celled von Neumann neighborhood.at n=22A287855
• Numbers k >= 1 such that A000217(k) divided by A018804(k) is an integer.at n=32A349724
• a(n) is the number of exterior top arches (no covering arch) for semi-meanders in generation n+1 that are generated by semi-meanders with n top arches and floor((n+2)/2) exterior top arches using the exterior arch splitting algorithm.at n=30A365679