87552

Appears in sequences

• Coordination sequence for 4-dimensional cubic lattice (points on surface of 4-dimensional cross-polytope).at n=32A008412
• Number of rational knots (or two-bridge knots) with n crossings (up to mirroring).at n=18A018240
• Coordination sequence for C_4 lattice.at n=16A019560
• A convolution triangle of numbers obtained from A036070.at n=23A030526
• Duplicate of A018240.at n=18A090596
• Triangle read by rows: T(n,k) is the number of permutations of [n] with k runs of length 1. For example, 457/3/26/1 has two runs of length 1: 3 and 1.at n=48A097898
• Sum of divisors of the number of partitions of n.at n=39A139041
• a(n) = prime(prime(prime(prime(A028815(n) - 1) - 1) - 1) - 1) - 1.at n=13A141132
• Coefficient of x in the reduction by x^2 -> x+2 of the polynomial p(n,x) defined below in Comments.at n=9A192382
• Coefficient of x in the reduction by x^2->x+2 of the polynomial p(n,x)=1+x^n+x^(2n).at n=8A192466
• Triangular array: the fusion of polynomial sequences P and Q given by p(n,x) = (x+2)^n and q(n,x) = (2*x+1)^n.at n=30A193728
• Mirror of the triangle A193728.at n=33A193729
• Number of 3-cycles in the n X n black bishop graph.at n=32A289161
• Number of oriented rational links with crossing number n.at n=17A329908
• Numbers k such that A000005(k) = A000688(k).at n=19A369168