A153294 - cp's OEIS frontend

A153294 G.f.: A(x) = F(xF(x)^2) = F(F(x)-1) where F(x) = 1 + xF(x)^2 is the g.f. of A000108 (Catalan).

n	a(n)
0	1
1	1
2	4
3	18
4	86
5	427
6	2180
7	11373
8	60380
9	325259
10	1773842
11	9776637
12	54380144
13	304905223
14	1721650832
15	9782051362
16	55888463214
17	320898932595
18	1850762866662
19	10717217871255
20	62287285235230
21	363212668363520
22	2124430957852380

[1, 1, 4, 18, 86, 427, 2180, 11373, 60380, 325259, 1773842, 9776637, 54380144, 304905223, 1721650832, 9782051362, 55888463214, 320898932595, 1850762866662, 10717217871255, 62287285235230, 363212668363520, 2124430957852380]

cp's OEIS Frontend

A153294 G.f.: A(x) = F(xF(x)^2) = F(F(x)-1) where F(x) = 1 + xF(x)^2 is the g.f. of A000108 (Catalan).

Table of values

List of values

cp's OEIS Frontend

A153294 G.f.: A(x) = F(x*F(x)^2) = F(F(x)-1) where F(x) = 1 + x*F(x)^2 is the g.f. of A000108 (Catalan).

Table of values

List of values

A153294 G.f.: A(x) = F(xF(x)^2) = F(F(x)-1) where F(x) = 1 + xF(x)^2 is the g.f. of A000108 (Catalan).