-489

Appears in sequences

• Expansion of (1-x)^(-1)/(1+x^2-2*x^3).at n=21A077887
• Expansion of (1+x)^(1/3)/(1+x-9*x^4)^(1/3).at n=13A098535
• Expansion of psi(x^3) / psi(x) in powers of x where psi() is a Ramanujan theta function.at n=35A101195
• Coefficients of the A-Rogers-Selberg identity.at n=47A104408
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 315", based on the 5-celled von Neumann neighborhood.at n=13A271249
• a(n) = A000730(7*n).at n=7A282941
• a(n) = (n!)*2^(n-1)*mu_h(n) where mu_h is the hypergeometric Moebius function associated to the Dirichlet character modulo 4 h={1,0,-1,0,1,...} (see comment).at n=4A298510
• n minus the Heinz number of the conjugate of the integer partition with Heinz number n.at n=22A352491
• Triangle of coefficients T(n,k) in g.f. A(x,y) satisfying Sum_{n=-oo..+oo} (-1)^n * (x^n + y*A(x,y))^n = 1 + (y+2)*Sum_{n>=1} (-1)^n * x^(n^2), for n >= 1, as read by rows.at n=74A370040