38544

Appears in sequences

• Reverse digits of number of partitions of n.at n=41A004089
• Number of 7 X 7 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.at n=30A156392
• a(n) = (2*n^3 + 5*n^2 - 7*n)/2.at n=32A162261
• Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, up, up, down, down.at n=8A177545
• Start with the triangle with 4 markings of the Shield tiling and recursively apply the substitution rule. a(n) is the number of triangles with 6 markings after n iterations.at n=9A298680
• a(n) = 4*(n+1)*(9*n+4).at n=32A304505
• Number of n element multisets of the 12th roots of unity with zero sum.at n=25A321417
• The number of edges inside a hexagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.at n=4A330845
• E.g.f.: 1 / (1 - x - log(1 - x)).at n=12A338448
• a(n) = phi(n!-1), where phi is Euler's totient function (A000010).at n=6A366759
• Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of the n*(k+1) boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of edges in the resulting planar graph.at n=31A367324