A138164 - cp's OEIS frontend

A138164 Row sums of Riordan array (c(-x^2),xc(-x^2)^2)^(-1) where c(x) is the g.f. of A000108.

n	a(n)
0	1
1	1
2	2
3	4
4	9
5	20
6	47
7	109
8	262
9	622
10	1516
11	3653
12	8988
13	21883
14	54213
15	133004
16	331233
17	817432
18	2044151
19	5068346
20	12716872
21	31651555
22	79636493
23	198843284
24	501466519
25	1255489165
26	3172569392
27	7961388439
28	20152910577
29	50674576772

[1, 1, 2, 4, 9, 20, 47, 109, 262, 622, 1516, 3653, 8988, 21883, 54213, 133004, 331233, 817432, 2044151, 5068346, 12716872, 31651555, 79636493, 198843284, 501466519, 1255489165, 3172569392, 7961388439, 20152910577, 50674576772]

cp's OEIS Frontend

A138164 Row sums of Riordan array (c(-x^2),xc(-x^2)^2)^(-1) where c(x) is the g.f. of A000108.

Table of values

List of values