A202476 - cp's OEIS frontend

A202476 G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (1 + k*x + x^2).

n	a(n)
0	1
1	1
2	2
3	5
4	11
5	28
6	74
7	206
8	601
9	1826
10	5766
11	18851
12	63676
13	221678
14	793958
15	2920292
16	11014653
17	42543773
18	168074091
19	678403932
20	2794920078
21	11742254750
22	50266213000
23	219085792538
24	971543475593
25	4380664101448
26	20071848941411
27	93403455862117
28	441206005123701

[1, 1, 2, 5, 11, 28, 74, 206, 601, 1826, 5766, 18851, 63676, 221678, 793958, 2920292, 11014653, 42543773, 168074091, 678403932, 2794920078, 11742254750, 50266213000, 219085792538, 971543475593, 4380664101448, 20071848941411, 93403455862117, 441206005123701]

cp's OEIS Frontend

A202476 G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (1 + k*x + x^2).

Table of values

List of values