A138175 - cp's OEIS frontend

A138175 Row sums of the Riordan array (1/(1+x),x(1+2x)/(1+x)^3)^(-1).

n	a(n)
0	1
1	2
2	4
3	10
4	24
5	62
6	156
7	408
8	1048
9	2758
10	7164
11	18922
12	49488
13	131016
14	344208
15	912720
16	2405496
17	6385814
18	16868604
19	44818494
20	118595064
21	315299694
22	835423164
23	2222185344
24	5894038944
25	15684059112

[1, 2, 4, 10, 24, 62, 156, 408, 1048, 2758, 7164, 18922, 49488, 131016, 344208, 912720, 2405496, 6385814, 16868604, 44818494, 118595064, 315299694, 835423164, 2222185344, 5894038944, 15684059112]

cp's OEIS Frontend

A138175 Row sums of the Riordan array (1/(1+x),x(1+2x)/(1+x)^3)^(-1).

Table of values

List of values