A261240 - cp's OEIS frontend

A261240 Expansion of f(-x^6, -x^12)^2 / (f(-x, -x) * f(-x^3, -x^15)) in powers of x where f(, ) is Ramanujan's general theta function.

n	a(n)
0	1
1	2
2	4
3	9
4	16
5	28
6	47
7	76
8	120
9	185
10	280
11	416
12	608
13	878
14	1252
15	1765
16	2464
17	3408
18	4676
19	6364
20	8600
21	11545
22	15400
23	20424
24	26938
25	35346
26	46152
27	59981
28	77616
29	100016
30	128369
31	164140
32	209120
33	265510
34	335992
35	423840
36	533035
37	668404
38	835804
39	1042308
40	1296448

[1, 2, 4, 9, 16, 28, 47, 76, 120, 185, 280, 416, 608, 878, 1252, 1765, 2464, 3408, 4676, 6364, 8600, 11545, 15400, 20424, 26938, 35346, 46152, 59981, 77616, 100016, 128369, 164140, 209120, 265510, 335992, 423840, 533035, 668404, 835804, 1042308, 1296448]

cp's OEIS Frontend

A261240 Expansion of f(-x^6, -x^12)^2 / (f(-x, -x) * f(-x^3, -x^15)) in powers of x where f(, ) is Ramanujan's general theta function.

Table of values

List of values