A123861 - cp's OEIS frontend

A123861 Expansion of (f(q) * f(q^3) / (f(-q) * f(-q^3)))^2 in powers of q where f() is a Ramanujan theta function.

n	a(n)
0	1
1	4
2	8
3	20
4	48
5	88
6	168
7	320
8	544
9	932
10	1584
11	2544
12	4080
13	6488
14	9984
15	15288
16	23232
17	34568
18	51144
19	75152
20	108832
21	156736
22	224352
23	317728
24	447648
25	627292
26	871856
27	1206068
28	1660416
29	2271032
30	3092976
31	4194464
32	5657728
33	7602096
34	10175760

[1, 4, 8, 20, 48, 88, 168, 320, 544, 932, 1584, 2544, 4080, 6488, 9984, 15288, 23232, 34568, 51144, 75152, 108832, 156736, 224352, 317728, 447648, 627292, 871856, 1206068, 1660416, 2271032, 3092976, 4194464, 5657728, 7602096, 10175760]

cp's OEIS Frontend

A123861 Expansion of (f(q) * f(q^3) / (f(-q) * f(-q^3)))^2 in powers of q where f() is a Ramanujan theta function.

Table of values

List of values