A320246 Expansion of Product_{k=1..12} theta_3(q^k), where theta_3() is the Jacobi theta function.

1, 2, 2, 6, 8, 10, 22, 26, 36, 60, 78, 106, 152, 200, 252, 360, 456, 564, 770, 940, 1178, 1532, 1852, 2256, 2858, 3430, 4100, 5086, 5982, 7076, 8612, 10040, 11672, 13960, 16068, 18496, 21866, 24796, 28288, 32924, 37074, 41876, 48156, 53732, 60014, 68546, 75836, 83996

Offset

0,2

Comments

Also the number of integer solutions (a_1, a_2, ... , a_12) to the equation a_1^2 + 2*a_2^2 + ... + 12*a_12^2 = n.

Links

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

Eric Weisstein's World of Mathematics, Jacobi Theta Functions

Crossrefs

Product_{k=1..m} theta_3(q^k): A000122 (m=1), A033715 (m=2), A029594 (m=3), A320139 (m=4), A320231 (m=5), A320232 (m=6), A320233 (m=7), A320234 (m=8), A320241 (m=9), A320242 (m=10), this sequence (m=12), A320247 (m=16).

Cf. A320067.

Sequence in context: A320234 A320241 A320242 * A320247 A320248 A320067

Adjacent sequences: A320243 A320244 A320245 * A320247 A320248 A320249

Keyword

nonn

Author

Seiichi Manyama, Oct 08 2018

Status

approved