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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 49 |
| 9 | 1513 |
| 10 | 38281 |
| 11 | 874886 |
| 12 | 18943343 |
| 13 | 399080475 |
| 14 | 8312317976 |
| 15 | 172912977525 |
| 16 | 3615907795025 |
| 17 | 76340522760097 |
| 18 | 1631788075873114 |
| 19 | 35378058306185002 |
| 20 | 778860477345867008 |
| 21 | 17423197016288134608 |
| 22 | 396169070839236609236 |
| 23 | 9157097111888617643722 |
| 24 | 215143361542096212159897 |
[1,49,1513,38281,874886,18943343,399080475, 8312317976,172912977525,3615907795025, 76340522760097,1631788075873114,35378058306185002, 778860477345867008,17423197016288134608, 396169070839236609236,9157097111888617643722, 215143361542096212159897] |