40681

Appears in sequences

• Expansion of (1-x)^(-1)/(1+2*x+2*x^2-x^3).at n=26A077933
• Diagonal sum of number triangle A119828.at n=4A119829
• Number of nondecreasing arrangements of n numbers x(i) in -(n+2)..(n+2) with the sum of sign(x(i))*x(i)^2 zero.at n=8A187997
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 41", based on the 5-celled von Neumann neighborhood.at n=40A269874
• Number of series-reduced anti-binary (no unary or binary branchings) unlabeled rooted trees with n nodes.at n=26A303025