0,2

Seiichi Manyama, Table of n, a(n) for n = 0..10000

Olivia X. M. Yao, Ernest X. W. Xia, Combinatorial proofs of five formulas of Liouville, Discrete Math. 318 (2014), 1--9. MR3141622.

Yao and Xia give an explicit formula for a(n) due to Liouville.

G.f.: theta_3(q)*theta_3(q^4)^3, where theta_3() is the Jacobi theta function. - Ilya Gutkovskiy, Aug 03 2018

Cf. A000118.

Sequence in context: A215122 A332473 A235789 * A134414 A113036 A000425

Adjacent sequences: A236922 A236923 A236924 * A236926 A236927 A236928

nonn,look

N. J. A. Sloane, Feb 14 2014

approved