A023421 - cp's OEIS frontend

A023421 Generalized Catalan Numbers x^2A(x)^2 -(1-x+x^2+x^3+x^4)A(x) + 1 =0.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	4
7	8
8	16
9	32
10	65
11	133
12	274
13	568
14	1184
15	2481
16	5223
17	11042
18	23434
19	49908
20	106633
21	228505
22	490999
23	1057683
24	2283701
25	4941502
26	10713941
27	23272929
28	50642017
29	110377543
30	240944076
31	526717211
32	1152996206
33	2527166334
34	5545804784
35	12184053993

[1, 1, 1, 1, 1, 2, 4, 8, 16, 32, 65, 133, 274, 568, 1184, 2481, 5223, 11042, 23434, 49908, 106633, 228505, 490999, 1057683, 2283701, 4941502, 10713941, 23272929, 50642017, 110377543, 240944076, 526717211, 1152996206, 2527166334, 5545804784, 12184053993]

cp's OEIS Frontend

A023421 Generalized Catalan Numbers x^2A(x)^2 -(1-x+x^2+x^3+x^4)A(x) + 1 =0.

Table of values

List of values

cp's OEIS Frontend

A023421 Generalized Catalan Numbers x^2*A(x)^2 -(1-x+x^2+x^3+x^4)*A(x) + 1 =0.

Table of values

List of values

A023421 Generalized Catalan Numbers x^2A(x)^2 -(1-x+x^2+x^3+x^4)A(x) + 1 =0.