n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 17 |
4 | 113 |
5 | 693 |
6 | 4123 |
7 | 24234 |
8 | 141738 |
9 | 827298 |
10 | 4824716 |
11 | 28127435 |
12 | 163955435 |
13 | 955642695 |
14 | 5569991317 |
15 | 32464523892 |
16 | 189217679988 |
17 | 1102842830628 |
18 | 6427842380918 |
19 | 37464218883749 |
20 | 218357488856453 |
21 | 1272680757553593 |
22 | 7417727160997231 |
23 | 43233682460792670 |
[0,0,2,17,113,693,4123,24234,141738,827298, 4824716,28127435,163955435,955642695,5569991317, 32464523892,189217679988,1102842830628, 6427842380918,37464218883749,218357488856453, 1272680757553593,7417727160997231, 43233682460792670] |