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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 25272 |
| 3 | 357756 |
| 4 | 8277072 |
| 5 | 159397596 |
| 6 | 3266423688 |
| 7 | 63310818360 |
| 8 | 1232016734502 |
| 9 | 23480085224460 |
| 10 | 445037745455958 |
| 11 | 8347562556153996 |
| 12 | 155656709783860410 |
| 13 | 2883687582601214532 |
| 14 | 53163977044543395168 |
| 15 | 975616567564729165860 |
[0,25272,357756,8277072,159397596,3266423688, 63310818360,1232016734502,23480085224460, 445037745455958,8347562556153996, 155656709783860410,2883687582601214532, 53163977044543395168,975616567564729165860] |