A168598 - cp's OEIS frontend

A168598 G.f.: exp( Sum_{n>=1} A002426(n)^2*x^n/n ), where A002426(n) is the central trinomial coefficients.

n	a(n)
0	1
1	1
2	5
3	21
4	119
5	703
6	4515
7	30227
8	210274
9	1503930
10	11008198
11	82099262
12	622013122
13	4775754930
14	37089503826
15	290914775618
16	2301706690657
17	18351027768401
18	147308337621061
19	1189704370416949
20	9661185599013209
21	78844977025403657

[1, 1, 5, 21, 119, 703, 4515, 30227, 210274, 1503930, 11008198, 82099262, 622013122, 4775754930, 37089503826, 290914775618, 2301706690657, 18351027768401, 147308337621061, 1189704370416949, 9661185599013209, 78844977025403657]

cp's OEIS Frontend

A168598 G.f.: exp( Sum_{n>=1} A002426(n)^2*x^n/n ), where A002426(n) is the central trinomial coefficients.

Table of values

List of values