n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 8 |
4 | 57 |
5 | 638 |
6 | 9949 |
7 | 198440 |
8 | 4791323 |
9 | 135142796 |
10 | 4346814276 |
11 | 156713948672 |
12 | 6251579884084 |
13 | 273172369790743 |
14 | 12969420360339724 |
15 | 664551587744173992 |
16 | 36543412829258260135 |
17 | 2146170890448154922648 |
18 | 134053014635659737513358 |
19 | 8872652968135849629240560 |
[1,1,2,8,57,638,9949,198440,4791323,135142796, 4346814276,156713948672,6251579884084, 273172369790743,12969420360339724, 664551587744173992,36543412829258260135, 2146170890448154922648,134053014635659737513358, 8872652968135849629240560] |