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| n | a(n) |
|---|---|
| 5 | 0 |
| 6 | 76 |
| 7 | 10956 |
| 8 | 371016 |
| 9 | 4988324 |
| 10 | 39302784 |
| 11 | 218633416 |
| 12 | 952344088 |
| 13 | 3460482612 |
| 14 | 10932805668 |
| 15 | 30901640212 |
| 16 | 79762409256 |
| 17 | 190898410020 |
| 18 | 428596770008 |
| 19 | 910935932112 |
| 20 | 1846146025240 |
| 21 | 3588666200596 |
| 22 | 6723331905852 |
| 23 | 12188915557404 |
| 24 | 21455723224456 |
| 25 | 36776237135268 |
| 26 | 61533021405936 |
[0,76,10956,371016,4988324,39302784,218633416, 952344088,3460482612,10932805668,30901640212, 79762409256,190898410020,428596770008, 910935932112,1846146025240,3588666200596, 6723331905852,12188915557404,21455723224456, 36776237135268,61533021405936] |