A171190 - cp's OEIS frontend

A171190 G.f. satisfies: A(x) = exp( Sum_{n>=1} (A(x)^n + A(-x)^n) * x^n/n ).

n	a(n)
0	1
1	2
2	3
3	10
4	27
5	112
6	336
7	1490
8	4791
9	22138
10	74079
11	351288
12	1207620
13	5831208
14	20436516
15	100004994
16	355610367
17	1758044950
18	6322608561
19	31511387450
20	114359284515
21	573713781760
22	2097612975456
23	10580600244664
24	38925304968612

[1, 2, 3, 10, 27, 112, 336, 1490, 4791, 22138, 74079, 351288, 1207620, 5831208, 20436516, 100004994, 355610367, 1758044950, 6322608561, 31511387450, 114359284515, 573713781760, 2097612975456, 10580600244664, 38925304968612]

cp's OEIS Frontend

A171190 G.f. satisfies: A(x) = exp( Sum_{n>=1} (A(x)^n + A(-x)^n) * x^n/n ).

Table of values

List of values