8912896

Appears in sequences

• a(n) = binomial(n,2) * 2^(n-1).at n=17A001815
• Permutation of N induced by rotating the node 4 right in the infinite planar binary tree shown at A065658.at n=64A065666
• 20-almost primes (generalization of semiprimes).at n=17A069281
• 4th binomial transform of (1,3,0,0,0,0,0,.....).at n=10A081039
• Expansion of g.f. (1 - x)^2*(1 + x) / (1 - 2*x)^2.at n=20A106472
• a(n) = 17*2^n.at n=19A110287
• Numbers k such that phi(k) is a perfect 11th power.at n=19A114573
• a(n) = 2^prime(n) + 2^prime(n+1).at n=7A137389
• a(n) = n^5*(n+1)/2.at n=16A168351
• a(n) = n^10*(n^2 + 1)/2.at n=4A170794
• a(n) = Product_{k=1..n} b(k,n), where b(k,n) is the largest positive integer that, when written in binary, occurs as a substring in both binary k and binary n.at n=16A175490
• Number of (n+1) X (n+1) 0..1 arrays with the number of clockwise edge increases in every 2 X 2 subblock differing from each horizontal or vertical neighbor.at n=16A205186
• Expansion of (1 + 2*x)^2/(1 - 2*x)^2.at n=17A241204
• Triangle for denominators of coefficients for integrated odd powers of cos(x) in terms sin((2*m+1)*x).at n=63A273172
• Denominators of coefficients in the asymptotic expansion of the logarithm of the central binomial coefficient.at n=8A275995
• 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 22", based on the 5-celled von Neumann neighborhood.at n=37A285437
• 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 398", based on the 5-celled von Neumann neighborhood.at n=25A288015
• 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 902", based on the 5-celled von Neumann neighborhood.at n=23A290666
• a(n) is the number of subsets of {1,2,...,n} that contain exactly two odd numbers.at n=32A330592