26330

Appears in sequences

• Number of ways to arrange 3 nonattacking triangular rooks on an nXnXn triangular grid.at n=11A193981
• Number of nX6 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself.at n=11A195960
• Second crank moment minus second rank moment: M_2(n) - N_2(n) = 2*spt(n).at n=26A211982
• a(1) = 0, and for n > 1, a(n) = 2*a(A252463(n)) + [n == 1 (mod 2)]*[J(3|n) == -1], where J is the Jacobi-symbol.at n=58A292255
• Expansion of Product_{k>=1} (1 + x^k)^A050985(k).at n=21A301596
• Triangle read by rows: T(n,k) (n >= 5, 4 <= k <= n-1) = number of lattice 3-polytopes of width larger than 1, size n, and k vertices.at n=42A319958
• Number of multiples of n which have only distinct and nonzero digits in base 10.at n=37A328287
• Triangle read by rows: T(n,k) is the number of balanced reduced multisystems of weight n with atoms colored using exactly k colors.at n=19A330776