A261519 - cp's OEIS frontend

A261519 Expansion of Product_{k>=1} ((1+x^k)/(1-x^k))^(2^k).

n	a(n)
0	1
1	4
2	16
3	60
4	208
5	692
6	2224
7	6940
8	21152
9	63188
10	185488
11	536268
12	1529648
13	4310804
14	12017264
15	33171916
16	90745472
17	246201412
18	662897232
19	1772295020
20	4707336848
21	12426673188
22	32617079280
23	85152717404
24	221183486496
25	571784014244
26	1471463190032
27	3770577250716

[1, 4, 16, 60, 208, 692, 2224, 6940, 21152, 63188, 185488, 536268, 1529648, 4310804, 12017264, 33171916, 90745472, 246201412, 662897232, 1772295020, 4707336848, 12426673188, 32617079280, 85152717404, 221183486496, 571784014244, 1471463190032, 3770577250716]

cp's OEIS Frontend

A261519 Expansion of Product_{k>=1} ((1+x^k)/(1-x^k))^(2^k).

Table of values

List of values