-687

Appears in sequences

• Expansion of e.g.f. cosh(sin(sin(x))), even powers only.at n=4A009142
• E.g.f. exp(sin(sin(x))).at n=8A009201
• Values of n such that L(5) and N(5) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=29A226925
• Expansion of f(-x, -x^5)^2 / f(x, x^3) in powers of x where f(, ) is Ramanujan's general theta function.at n=19A263041
• Expansion of psi(x) * psi(x^9) * f(-x^3) / psi(x^3)^2 in powers of x where psi(), and f() are Ramanujan theta functions.at n=58A267852
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 249", based on the 5-celled von Neumann neighborhood.at n=17A271015
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 481", based on the 5-celled von Neumann neighborhood.at n=19A272458
• Expansion of Sum_{k>=0} x^(k^2) / Product_{j=1..k} (1 + x^j)^j.at n=52A306708
• G.f. A(x) satisfies: A(x) = x + x^3 * A(x/(1 + x)) / (1 + x).at n=12A351188