A371309 - cp's OEIS frontend

A371309 Expansion of e.g.f. Product_{k>=1} (1 + x^k/k!)^(k^2).

n	a(n)
0	1
1	1
2	4
3	21
4	88
5	645
6	4386
7	33061
8	296808
9	2674377
10	26757190
11	285294801
12	3199971336
13	38104015417
14	476816609192
15	6261875218215
16	85736036949856
17	1227373767823617
18	18255004438680558
19	281702101344334993
20	4509097743074878200
21	74606738071821274641
22	1275212550939684334384

[1, 1, 4, 21, 88, 645, 4386, 33061, 296808, 2674377, 26757190, 285294801, 3199971336, 38104015417, 476816609192, 6261875218215, 85736036949856, 1227373767823617, 18255004438680558, 281702101344334993, 4509097743074878200, 74606738071821274641, 1275212550939684334384]

cp's OEIS Frontend

A371309 Expansion of e.g.f. Product_{k>=1} (1 + x^k/k!)^(k^2).

Table of values

List of values