-5123

Appears in sequences

• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 141", based on the 5-celled von Neumann neighborhood.at n=41A270285
• Expansion of e.g.f. exp(x * (1-2*x)).at n=7A362176
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * Sum_{j=0..floor(n/2)} (-k/2)^j * binomial(n-j,j)/(n-j)!.at n=73A362277
• Numerators of the partial alternating sums of the reciprocals of the alternating sum of divisors function (A206369).at n=16A379621