A028628 Expansion of (theta_3(z)*theta_3(15z) + theta_2(z)*theta_2(15z))^4.

1, 8, 24, 32, 40, 144, 304, 288, 408, 1000, 1216, 1344, 2368, 2384, 2976, 5288, 4264, 4656, 8504, 5792, 10032, 11232, 11072, 10176, 20016, 17624, 19056, 25280, 23904, 23184, 46552, 27072, 34968, 46240, 41360, 47136, 67784, 46288, 55776, 74720, 81600, 65232, 104928

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)))^4, n); \\ Jinyuan Wang, Feb 20 2020

Crossrefs

Cf. A028626, A028627.

Sequence in context: A269420 A056196 A044069 * A333427 A128690 A283078

Adjacent sequences: A028625 A028626 A028627 * A028629 A028630 A028631

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Jinyuan Wang, Feb 20 2020

Status

approved