n | a(n) |
---|---|
0 | -1 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 8 |
5 | 40 |
6 | 244 |
7 | 1736 |
8 | 14084 |
9 | 128176 |
10 | 1292788 |
11 | 14313272 |
12 | 172603124 |
13 | 2252192608 |
14 | 31620422980 |
15 | 475350915656 |
16 | 7618759828388 |
17 | 129697180826512 |
18 | 2337145267316500 |
19 | 44446207287450968 |
20 | 889595868295057364 |
21 | 18693361200724345024 |
22 | 411475140936880082020 |
[-1,0,1,2,8,40,244,1736,14084,128176,1292788, 14313272,172603124,2252192608,31620422980, 475350915656,7618759828388,129697180826512, 2337145267316500,44446207287450968, 889595868295057364,18693361200724345024, 411475140936880082020] |