n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 23 |
4 | 209 |
5 | 2744 |
6 | 49539 |
7 | 1180281 |
8 | 35921892 |
9 | 1360513711 |
10 | 62770245601 |
11 | 3466178083312 |
12 | 225719029475675 |
13 | 17117740162448105 |
14 | 1495526385479298140 |
15 | 149120758170390404103 |
16 | 16831018302445533666705 |
17 | 2134813624482300873515304 |
18 | 302332062412598445891728563 |
[1,1,4,23,209,2744,49539,1180281,35921892, 1360513711,62770245601,3466178083312, 225719029475675,17117740162448105, 1495526385479298140,149120758170390404103, 16831018302445533666705,2134813624482300873515304, 302332062412598445891728563] |