A321520 - cp's OEIS frontend

A321520 Expansion of Product_{k>=1} (1 + (k - 1)!*x^k).

n	a(n)
0	1
1	1
2	1
3	3
4	8
5	32
6	152
7	882
8	5964
9	46644
10	411564
11	4056912
12	44097072
13	524234448
14	6761911968
15	94055452128
16	1403047948320
17	22342552398720
18	378256278306240
19	6783950610708480
20	128480976137122560
21	2562250754919421440
22	53668564630447910400

[1, 1, 1, 3, 8, 32, 152, 882, 5964, 46644, 411564, 4056912, 44097072, 524234448, 6761911968, 94055452128, 1403047948320, 22342552398720, 378256278306240, 6783950610708480, 128480976137122560, 2562250754919421440, 53668564630447910400]

cp's OEIS Frontend

A321520 Expansion of Product_{k>=1} (1 + (k - 1)!*x^k).

Table of values

List of values