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A112425 as a simple table
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 3 |
| 7 | 31 |
| 8 | 298 |
| 9 | 2616 |
| 10 | 20346 |
| 11 | 140605 |
| 12 | 880737 |
| 13 | 5082279 |
| 14 | 27402524 |
| 15 | 139587885 |
| 16 | 677772953 |
| 17 | 3158930531 |
| 18 | 14212444473 |
| 19 | 62009204208 |
| 20 | 263350765116 |
| 21 | 1092085621098 |
| 22 | 4433596269478 |
[0,0,0,0,1,3,31,298,2616,20346,140605,880737, 5082279,27402524,139587885,677772953,3158930531, 14212444473,62009204208,263350765116, 1092085621098,4433596269478] |