A303391 - cp's OEIS frontend

A303391 Expansion of Product_{k>=1} (1 + 4x^k)/(1 - 4x^k).

n	a(n)
0	1
1	8
2	40
3	200
4	872
5	3720
6	15400
7	62920
8	254440
9	1024648
10	4112680
11	16483400
12	66000360
13	264150920
14	1056903080
15	4228272200
16	16914393832
17	67660396040
18	270647139240
19	1082600410440
20	4330424811880
21	17321748357640
22	69287088965800
23	277148557003720
24	1108594618342760

[1, 8, 40, 200, 872, 3720, 15400, 62920, 254440, 1024648, 4112680, 16483400, 66000360, 264150920, 1056903080, 4228272200, 16914393832, 67660396040, 270647139240, 1082600410440, 4330424811880, 17321748357640, 69287088965800, 277148557003720, 1108594618342760]

cp's OEIS Frontend

A303391 Expansion of Product_{k>=1} (1 + 4x^k)/(1 - 4x^k).

Table of values

List of values

cp's OEIS Frontend

A303391 Expansion of Product_{k>=1} (1 + 4*x^k)/(1 - 4*x^k).

Table of values

List of values

A303391 Expansion of Product_{k>=1} (1 + 4x^k)/(1 - 4x^k).