-3344

Appears in sequences

• a(n)=the (1,2)-entry of the n-th power of the 2 X 2 matrix [0,-1;n-1,2*(n-1)].at n=4A109520
• Irregular triangle read by rows: coefficients of polynomials related to a family of convolutions of certain central binomial sequences.at n=53A142961
• G.f. satisfies: A(x) = 1 + x*A(x) / ( A(I*x)*A(-I*x) ).at n=23A216683
• Expansion of q * f(-q^2)^12 + 8 * q^2 * f(-q^4)^12 in powers of q where f() is a Ramanujan theta function.at n=25A227239
• Triangle read by rows: T(n, k) = 2^k * hypergeom([-n, -k], [], -1/2).at n=35A375855