A180473 - cp's OEIS frontend

A180473 Expansion of o.g.f. xs(x)/(1-xs(x)-x^2*s(x)^2), where s(x) is the o.g.f. of the little Schroeder numbers (A001003).

n	a(n)
1	1
2	2
3	7
4	27
5	114
6	509
7	2365
8	11318
9	55411
10	276231
11	1397430
12	7156089
13	37023225
14	193229466
15	1016141199
16	5378940051
17	28638955098
18	153267403397
19	824014568581
20	4448456379134
21	24104579252971
22	131055735586767
23	714741620026542
24	3908997981612017
25	21434123083817329

[1, 2, 7, 27, 114, 509, 2365, 11318, 55411, 276231, 1397430, 7156089, 37023225, 193229466, 1016141199, 5378940051, 28638955098, 153267403397, 824014568581, 4448456379134, 24104579252971, 131055735586767, 714741620026542, 3908997981612017, 21434123083817329]

cp's OEIS Frontend

A180473 Expansion of o.g.f. xs(x)/(1-xs(x)-x^2*s(x)^2), where s(x) is the o.g.f. of the little Schroeder numbers (A001003).

Table of values

List of values

cp's OEIS Frontend

A180473 Expansion of o.g.f. x*s(x)/(1-x*s(x)-x^2*s(x)^2), where s(x) is the o.g.f. of the little Schroeder numbers (A001003).

Table of values

List of values

A180473 Expansion of o.g.f. xs(x)/(1-xs(x)-x^2*s(x)^2), where s(x) is the o.g.f. of the little Schroeder numbers (A001003).