n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 36 |
5 | 325 |
6 | 3924 |
7 | 58996 |
8 | 1049088 |
9 | 21526641 |
10 | 500010000 |
11 | 12968792826 |
12 | 371504434176 |
13 | 11649044974645 |
14 | 396857394156608 |
15 | 14596463098125000 |
16 | 576460752571858944 |
17 | 24330595941321312961 |
18 | 1092955779880368226560 |
19 | 52063675149116964615310 |
20 | 2621440000000512000000000 |
[1,1,2,6,36,325,3924,58996,1049088,21526641, 500010000,12968792826,371504434176,11649044974645, 396857394156608,14596463098125000, 576460752571858944,24330595941321312961, 1092955779880368226560,52063675149116964615310, 2621440000000512000000000] |