n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 36 |
5 | 166 |
6 | 968 |
7 | 6372 |
8 | 49368 |
9 | 429240 |
10 | 4198176 |
11 | 45268416 |
12 | 535590144 |
13 | 6879038400 |
14 | 95412176640 |
15 | 1419918128640 |
16 | 22571960048640 |
17 | 381596438638080 |
18 | 6836248502784000 |
19 | 129352329079142400 |
20 | 2577689266340966400 |
21 | 53957785094515814400 |
22 | 1183674698660605132800 |
[1,1,3,9,36,166,968,6372,49368,429240,4198176, 45268416,535590144,6879038400,95412176640, 1419918128640,22571960048640,381596438638080, 6836248502784000,129352329079142400, 2577689266340966400,53957785094515814400, 1183674698660605132800] |