A322892 - cp's OEIS frontend

A322892 a(n) = [x^n] Product_{k=1..n} (k + x + 2kx^2), for n >= 0.

n	a(n)
0	1
1	1
2	9
3	45
4	717
5	6917
6	154877
7	2254625
8	64599201
9	1267075953
10	44097148953
11	1092097482333
12	44645622936189
13	1338624157833861
14	62791851488870493
15	2213430779241737793
16	117082536584478235713
17	4748345510312622896993
18	279463602946698380026793
19	12824987274099379222626701
20	830920299335152521399853101
21	42586722790649923167650932101
22	3011022417317079016258969826109
23	170527854080899363788154404878305

[1, 1, 9, 45, 717, 6917, 154877, 2254625, 64599201, 1267075953, 44097148953, 1092097482333, 44645622936189, 1338624157833861, 62791851488870493, 2213430779241737793, 117082536584478235713, 4748345510312622896993, 279463602946698380026793, 12824987274099379222626701, 830920299335152521399853101, 42586722790649923167650932101, 3011022417317079016258969826109, 170527854080899363788154404878305]

cp's OEIS Frontend

A322892 a(n) = [x^n] Product_{k=1..n} (k + x + 2kx^2), for n >= 0.

Table of values

List of values

cp's OEIS Frontend

A322892 a(n) = [x^n] Product_{k=1..n} (k + x + 2*k*x^2), for n >= 0.

Table of values

List of values

A322892 a(n) = [x^n] Product_{k=1..n} (k + x + 2kx^2), for n >= 0.