A028627 Expansion of (theta_3(z)*theta_3(15z) + theta_2(z)*theta_2(15z))^3.

1, 6, 12, 8, 18, 72, 84, 48, 156, 222, 180, 360, 312, 168, 720, 342, 534, 552, 628, 444, 1272, 1008, 600, 1128, 1752, 894, 2520, 1040, 1008, 2520, 2140, 1452, 2796, 1560, 2112, 3024, 3690, 1368, 3576, 3528, 2520, 5040, 3120, 1848, 7560, 3872, 4128, 4392, 4744, 3750

Offset

0,2

Links

Jinyuan Wang, Table of n, a(n) for n = 0..1000

Prog

(PARI) a(n) = polcoeff((1 + 2*x*Ser(qfrep([2, 1; 1, 8], n, 1)))^3, n); \\ Jinyuan Wang, Feb 20 2020

Crossrefs

Cf. A028626, A028628.

Sequence in context: A236930 A028643 A236923 * A162522 A292680 A028320

Adjacent sequences: A028624 A028625 A028626 * A028628 A028629 A028630

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Jinyuan Wang, Feb 20 2020

Status

approved