A025242 - cp's OEIS frontend

A025242 Generalized Catalan numbers A(x)^2 -(1+x)^2A(x) +x(2+x+x^2) =0.

n	a(n)
1	2
2	1
3	1
4	2
5	5
6	13
7	35
8	97
9	275
10	794
11	2327
12	6905
13	20705
14	62642
15	190987
16	586219
17	1810011
18	5617914
19	17518463
20	54857506
21	172431935
22	543861219
23	1720737981
24	5459867166
25	17369553427
26	55391735455
27	177040109419
28	567019562429
29	1819536774089

[2, 1, 1, 2, 5, 13, 35, 97, 275, 794, 2327, 6905, 20705, 62642, 190987, 586219, 1810011, 5617914, 17518463, 54857506, 172431935, 543861219, 1720737981, 5459867166, 17369553427, 55391735455, 177040109419, 567019562429, 1819536774089]

cp's OEIS Frontend

A025242 Generalized Catalan numbers A(x)^2 -(1+x)^2A(x) +x(2+x+x^2) =0.

Table of values

List of values

cp's OEIS Frontend

A025242 Generalized Catalan numbers A(x)^2 -(1+x)^2*A(x) +x*(2+x+x^2) =0.

Table of values

List of values

A025242 Generalized Catalan numbers A(x)^2 -(1+x)^2A(x) +x(2+x+x^2) =0.