n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 18 |
3 | 110 |
4 | 780 |
5 | 6167 |
6 | 53494 |
7 | 504030 |
8 | 5112090 |
9 | 55411697 |
10 | 638154165 |
11 | 7770348170 |
12 | 99618149267 |
13 | 1339889000543 |
14 | 18848892749144 |
15 | 276573551651632 |
16 | 4222814264496510 |
17 | 66947348027905977 |
18 | 1099955438013660173 |
[1,3,18,110,780,6167,53494,504030,5112090, 55411697,638154165,7770348170,99618149267, 1339889000543,18848892749144,276573551651632, 4222814264496510,66947348027905977, 1099955438013660173] |