A177389 - cp's OEIS frontend

A177389 Expansion of o.g.f.: Sum_{n>=0} Product_{k=1..n} tanh(k*arctanh(x)).

n	a(n)
0	1
1	1
2	2
3	6
4	22
5	98
6	514
7	3110
8	21334
9	163650
10	1388162
11	12902086
12	130391830
13	1423632546
14	16699055490
15	209432697830
16	2796597560150
17	39613075175554
18	593253347702530
19	9366042608039814
20	155466234198142998

[1, 1, 2, 6, 22, 98, 514, 3110, 21334, 163650, 1388162, 12902086, 130391830, 1423632546, 16699055490, 209432697830, 2796597560150, 39613075175554, 593253347702530, 9366042608039814, 155466234198142998]

cp's OEIS Frontend

A177389 Expansion of o.g.f.: Sum_{n>=0} Product_{k=1..n} tanh(k*arctanh(x)).

Table of values

List of values