A303333 - cp's OEIS frontend

A303333 a(n) = [x^n] (theta_3(x^(1/2))^n + theta_4(x^(1/2))^n)/2, where theta_3() and theta_4() are the Jacobi theta functions.

n	a(n)
0	1
1	0
2	4
3	24
4	24
5	560
6	2080
7	11088
8	74864
9	343536
10	2050344
11	11676280
12	61903776
13	363737712
14	2022013760
15	11335886864
16	65187410400
17	365627715968
18	2085523894756
19	11894205734280
20	67517852274384
21	386394626371680
22	2205027379874400
23	12602057718873040
24	72195482578935488
25	413235574714857360

[1, 0, 4, 24, 24, 560, 2080, 11088, 74864, 343536, 2050344, 11676280, 61903776, 363737712, 2022013760, 11335886864, 65187410400, 365627715968, 2085523894756, 11894205734280, 67517852274384, 386394626371680, 2205027379874400, 12602057718873040, 72195482578935488, 413235574714857360]

cp's OEIS Frontend

A303333 a(n) = [x^n] (theta_3(x^(1/2))^n + theta_4(x^(1/2))^n)/2, where theta_3() and theta_4() are the Jacobi theta functions.

Table of values

List of values