-1587

Appears in sequences

• Coefficients of modular function denoted G_6(tau) by Atkin.at n=13A005764
• Expansion of (1-x)^(-1)/(1-x^2+2*x^3).at n=21A077884
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 435", based on the 5-celled von Neumann neighborhood.at n=29A272152
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 469", based on the 5-celled von Neumann neighborhood.at n=21A272419
• a(n) = Sum_{d|n} (-1)^(d-1) * binomial(d+n/d-1, d).at n=51A338682
• a(1) = 1, a(2) = 3; a(n) = n^2 * Sum_{d|n, d < n} (-1)^(n/d) a(d) / d^2.at n=45A361986