n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 35 |
5 | 228 |
6 | 1834 |
7 | 17582 |
8 | 195866 |
9 | 2487832 |
10 | 35499576 |
11 | 562356672 |
12 | 9794156448 |
13 | 186025364016 |
14 | 3826961710272 |
15 | 84775065603888 |
16 | 2011929826983504 |
17 | 50929108873336320 |
18 | 1369732445916318336 |
19 | 39005083331889816960 |
20 | 1172419218038422659456 |
21 | 37095226237402478348544 |
[0,1,2,7,35,228,1834,17582,195866,2487832, 35499576,562356672,9794156448,186025364016, 3826961710272,84775065603888,2011929826983504, 50929108873336320,1369732445916318336, 39005083331889816960,1172419218038422659456, 37095226237402478348544] |