108528

Appears in sequences

• Theta series of A*_20 lattice.at n=45A023932
• Number of (s(0), s(1), ..., s(n)) such that every s(i) is a nonnegative integer, s(0) = 0, s(1) = 1 = s(n), |s(i) - s(i-1)| <= 1 for i >= 2, |s(2) - s(1)| = 1, |s(3) - s(2)| = 1 if s(2) = 1. Also T(n,n-1), where T is the array in A026268.at n=12A026270
• Expansion of 1/((1-x)^4*(1-x^2)^2).at n=31A028346
• Number of ways to place a non-attacking white and black queen on n X n chessboard.at n=18A035291
• Partial sums of A051798.at n=15A051879
• Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089851/A089853.at n=12A089847
• Numbers that can be expressed as the difference of the squares of primes in exactly seven distinct ways.at n=31A092003
• Number of closed walks of length n at a vertex of the cyclic graph on 9 nodes C_9.at n=21A094233
• Row sums of triangle A099575.at n=13A099576
• Structured triakis tetrahedral numbers (vertex structure 4).at n=41A100175
• Triangle read by rows: T(n,k) is the number of nonroot nodes of outdegree k (0<=k<=n-1) in all non-crossing trees with n edges.at n=29A100400
• Concatenation of first 3 digits and last 3 digits of n-th perfect number.at n=15A138877
• Number of orbits of Aut(Z^7) as function of the infinity norm n of the representative lattice point of the orbit, when the cardinality of the orbit is equal to 322560.at n=20A266387
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=41A286785
• Expansion of 1 / ((1 - x)^7*(1 + x)^5).at n=31A299337
• Number of ways to write n as an ordered sum of eight positive Fibonacci numbers (with a single type of 1).at n=39A357716