n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 3 |
4 | 8 |
5 | 45 |
6 | 264 |
7 | 1855 |
8 | 14832 |
9 | 133497 |
10 | 1334960 |
11 | 14684571 |
12 | 176214840 |
13 | 2290792933 |
14 | 32071101048 |
15 | 481066515735 |
16 | 7697064251744 |
17 | 130850092279665 |
18 | 2355301661033952 |
19 | 44750731559645107 |
20 | 895014631192902120 |
21 | 18795307255050944541 |
22 | 413496759611120779880 |
[1,0,3,8,45,264,1855,14832,133497,1334960, 14684571,176214840,2290792933,32071101048, 481066515735,7697064251744,130850092279665, 2355301661033952,44750731559645107, 895014631192902120,18795307255050944541, 413496759611120779880] |