n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 2 |
4 | 9 |
5 | 23 |
6 | 99 |
7 | 353 |
8 | 1778 |
9 | 7927 |
10 | 45273 |
11 | 238797 |
12 | 1526331 |
13 | 9215950 |
14 | 65020448 |
15 | 439742641 |
16 | 3388075807 |
17 | 25270974635 |
18 | 210763775071 |
19 | 1713657668021 |
20 | 15359474721088 |
21 | 134902169999841 |
22 | 1291589459223627 |
23 | 12165062702520422 |
24 | 123780591852786693 |
25 | 1242763745129587332 |
[1,0,2,2,9,23,99,353,1778,7927,45273,238797, 1526331,9215950,65020448,439742641,3388075807, 25270974635,210763775071,1713657668021, 15359474721088,134902169999841,1291589459223627, 12165062702520422,123780591852786693, 1242763745129587332] |