38731

Appears in sequences

• a(n) = (4*n^2 + 2*n - 3)*(2*n - 1)*n/3.at n=11A058581
• Expansion of (eta(q^3)eta(q^15)/(eta(q)eta(q^5)))^2 in powers of q.at n=25A093065
• Integers of the form (x^4)/24 + (x^3)/6 + (x^2)/2 + x + 1 with x > 0.at n=9A127877
• Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 12.at n=1A154086
• 1/8 the number of n X 2 0..7 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=4A185899
• 1/8 the number of nX5 0..7 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=1A185902
• T(n,k)=1/8 the number of nXk 0..7 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=16A185903
• T(n,k)=1/8 the number of nXk 0..7 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=19A185903
• 27-gonal pyramidal numbers: a(n) = n*(n+1)*(25*n-22)/6.at n=21A256647
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 950", based on the 5-celled von Neumann neighborhood.at n=38A273829
• Number of n-vertex, 2-edge multigraphs that are not nesting. Number of n-vertex, 2-edge multigraphs that are not crossing.at n=22A326278
• Expansion of e.g.f. exp(x/(1-3*x)^(1/3)).at n=6A362205