A028643 - OEIS

A028643

Expansion of (theta_3(z)*theta_3(19z) + theta_2(z)*theta_2(19z))^3.

1, 6, 12, 8, 6, 36, 72, 60, 60, 126, 168, 180, 248, 312, 240, 352, 438, 540, 372, 606, 396, 760, 600, 900, 504, 1146, 792, 1160, 1140, 1560, 1152, 1680, 1548, 1840, 1680, 2160, 1710, 2448, 1668, 2232, 2280, 3120, 1800, 2820, 2844, 2916, 3120, 3780, 2792, 3906, 3492

(list; graph; refs; listen; history; text; internal format)

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, 10], n, 1)))^3, n); \\ Jinyuan Wang, Feb 19 2020

CROSSREFS

Cf. A028642, A028644.

Sequence in context: A236931 A028659 A236930 * A236923 A028627 A162522

Adjacent sequences: A028640 A028641 A028642 * A028644 A028645 A028646

KEYWORD