76221

Appears in sequences

• a(n) = T(2n-1, n-1), T given by A026780.at n=7A026784
• a(n) = T(n, floor(n/2)), T given by A026780.at n=15A026786
• a(n) = greatest number in row n of array T given by A026780.at n=15A027246
• Numbers n such that the sum of first n prime powers (A025475) is divisible by n.at n=10A225791
• The number of P-positions in the game of Nim with up to five piles, allowing for piles of zero, such that the total number of objects in all piles doesn't exceed 2n.at n=24A238147
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 817", based on the 5-celled von Neumann neighborhood.at n=41A273648
• O.g.f. A(x) satisfies: [x^n] exp(n^4 * x) * (1 - x*A(x)) = 0 for n > 0.at n=2A304394
• T(n,k) = V(n,k)/k!, where V(n,k) = k^(n*k) - Sum_{t=1..k-1} binomial(k,t)*k^(n*(k-t))*V(n,t) for n, k >= 1; square array T read by upwards antidiagonals.at n=17A342202
• a(n) = (27^n - 3*9^n - 3*12^n)/6 + 6^n.at n=3A342405