n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 10 |
6 | 56 |
7 | 468 |
8 | 7123 |
9 | 194066 |
10 | 9743542 |
11 | 900969091 |
12 | 153620333545 |
13 | 48432939150704 |
14 | 28361824488394169 |
15 | 30995890806033380784 |
16 | 63501635429109597504951 |
17 | 244852079292073376010411280 |
18 | 1783160594069429925952824734641 |
19 | 24603887051350945867492816663958981 |
[0,1,1,3,10,56,468,7123,194066,9743542,900969091, 153620333545,48432939150704,28361824488394169, 30995890806033380784,63501635429109597504951, 244852079292073376010411280, 1783160594069429925952824734641, 24603887051350945867492816663958981] |