A204064 - cp's OEIS frontend

A204064 G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k + nx) / (1 + kx + n*x^2).

n	a(n)
0	1
1	1
2	2
3	5
4	14
5	44
6	152
7	572
8	2324
9	10124
10	47012
11	231572
12	1204964
13	6599444
14	37924292
15	228033332
16	1431128804
17	9354072404
18	63548071172
19	447923400692
20	3270361265444
21	24696229801364
22	192625876675652
23	1549890430643252
24	12849460733123684
25	109647468132256724

[1, 1, 2, 5, 14, 44, 152, 572, 2324, 10124, 47012, 231572, 1204964, 6599444, 37924292, 228033332, 1431128804, 9354072404, 63548071172, 447923400692, 3270361265444, 24696229801364, 192625876675652, 1549890430643252, 12849460733123684, 109647468132256724]

cp's OEIS Frontend

A204064 G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k + nx) / (1 + kx + n*x^2).

Table of values

List of values

cp's OEIS Frontend

A204064 G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k + n*x) / (1 + k*x + n*x^2).

Table of values

List of values

A204064 G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k + nx) / (1 + kx + n*x^2).