A208237 - cp's OEIS frontend

A208237 G.f.: Sum_{n>=0} n! * x^n * Product_{k=1..n} (1 + kx) / (1 + kx + k^2*x^2).

n	a(n)
0	1
1	1
2	2
3	5
4	15
5	54
6	223
7	1045
8	5474
9	31685
10	200895
11	1384470
12	10304431
13	82376101
14	703949762
15	6403761365
16	61784985615
17	630180031734
18	6775001385343
19	76572619018165
20	907658144193314
21	11259399965148005
22	145879271404693215
23	1970471655222795990
24	27702625497930064591

[1, 1, 2, 5, 15, 54, 223, 1045, 5474, 31685, 200895, 1384470, 10304431, 82376101, 703949762, 6403761365, 61784985615, 630180031734, 6775001385343, 76572619018165, 907658144193314, 11259399965148005, 145879271404693215, 1970471655222795990, 27702625497930064591]

cp's OEIS Frontend

A208237 G.f.: Sum_{n>=0} n! * x^n * Product_{k=1..n} (1 + kx) / (1 + kx + k^2*x^2).

Table of values

List of values

cp's OEIS Frontend

A208237 G.f.: Sum_{n>=0} n! * x^n * Product_{k=1..n} (1 + k*x) / (1 + k*x + k^2*x^2).

Table of values

List of values

A208237 G.f.: Sum_{n>=0} n! * x^n * Product_{k=1..n} (1 + kx) / (1 + kx + k^2*x^2).