A333472 - cp's OEIS frontend

A333472 a(n) = [x^n] ( c (x/(1 + x)) )^n, where c(x) = (1 - sqrt(1 - 4x))/(2x) is the o.g.f. of the Catalan numbers A000108.

n	a(n)
0	1
1	1
2	3
3	13
4	59
5	276
6	1317
7	6371
8	31131
9	153292
10	759428
11	3780888
12	18900389
13	94805959
14	476945913
15	2405454213
16	12158471195
17	61574325840
18	312365992620
19	1587052145492
20	8074474510884
21	41131551386120
22	209760563456920
23	1070822078321520
24	5471643738383781
25	27982867986637151

[1, 1, 3, 13, 59, 276, 1317, 6371, 31131, 153292, 759428, 3780888, 18900389, 94805959, 476945913, 2405454213, 12158471195, 61574325840, 312365992620, 1587052145492, 8074474510884, 41131551386120, 209760563456920, 1070822078321520, 5471643738383781, 27982867986637151]

cp's OEIS Frontend

A333472 a(n) = [x^n] ( c (x/(1 + x)) )^n, where c(x) = (1 - sqrt(1 - 4x))/(2x) is the o.g.f. of the Catalan numbers A000108.

Table of values

List of values

cp's OEIS Frontend

A333472 a(n) = [x^n] ( c (x/(1 + x)) )^n, where c(x) = (1 - sqrt(1 - 4*x))/(2*x) is the o.g.f. of the Catalan numbers A000108.

Table of values

List of values

A333472 a(n) = [x^n] ( c (x/(1 + x)) )^n, where c(x) = (1 - sqrt(1 - 4x))/(2x) is the o.g.f. of the Catalan numbers A000108.