-2783

Appears in sequences

• G.f. A(x) satisfies: A(x)^2 equals the g.f. of A110630, which consists entirely of numbers 1 through 4.at n=24A112570
• Values of n such that L(16) and N(16) 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=12A227519
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 369", based on the 5-celled von Neumann neighborhood.at n=31A270793
• Expansion of f(-x) * f(-x^2)^4 / phi(x^2) in powers of x where phi(), f() are Ramanujan theta functions.at n=45A275372
• a(1) = 1; a(n) = -Sum_{k=2..n} k^2 * a(floor(n/k)).at n=43A360390
• a(1) = 1; a(n) = -Sum_{k=2..n} k^2 * a(floor(n/k)).at n=44A360390