A330538 - cp's OEIS frontend

A330538 Expansion of e.g.f. Product_{k>=1} 1 / (1 - arctanh(x^k)).

n	a(n)
0	1
1	1
2	4
3	20
4	136
5	1024
6	10208
7	103872
8	1287424
9	17001984
10	252383232
11	3971122176
12	69973813248
13	1281307791360
14	25646098022400
15	540521184067584
16	12170993370955776
17	286967313311858688
18	7206454521728335872
19	188326525698968518656

[1, 1, 4, 20, 136, 1024, 10208, 103872, 1287424, 17001984, 252383232, 3971122176, 69973813248, 1281307791360, 25646098022400, 540521184067584, 12170993370955776, 286967313311858688, 7206454521728335872, 188326525698968518656]

cp's OEIS Frontend

A330538 Expansion of e.g.f. Product_{k>=1} 1 / (1 - arctanh(x^k)).

Table of values

List of values