n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 2 |
4 | 3 |
5 | 6 |
6 | 57 |
7 | 141 |
8 | 390 |
9 | 8790 |
10 | 82128 |
11 | 11963 |
12 | 793212 |
13 | 835571 |
14 | 5054322 |
15 | 1661682 |
16 | 75880433 |
17 | 45322418 |
18 | 619541169 |
19 | 319375992 |
20 | 6745157241 |
21 | 3317093849 |
22 | 66891312600 |
23 | 843114912509 |
24 | 9837094694375 |
25 | 16065496578813 |
26 | 35901922360062 |
27 | 67557477392256 |
28 | 547721051611007 |
[0,0,2,3,6,57,141,390,8790,82128,11963,793212, 835571,5054322,1661682,75880433,45322418, 619541169,319375992,6745157241,3317093849, 66891312600,843114912509,9837094694375, 16065496578813,35901922360062,67557477392256, 547721051611007] |