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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 70 |
| 3 | 854 |
| 4 | 12068 |
| 5 | 191996 |
| 6 | 3374392 |
| 7 | 64635640 |
| 8 | 1335753664 |
| 9 | 29548086848 |
| 10 | 695221579136 |
| 11 | 17307703505792 |
| 12 | 453917707384960 |
| 13 | 12494500081323904 |
| 14 | 359807967643449088 |
| 15 | 10809816056831434496 |
| 16 | 337981832271282386432 |
[1,7,70,854,12068,191996,3374392,64635640, 1335753664,29548086848,695221579136, 17307703505792,453917707384960,12494500081323904, 359807967643449088,10809816056831434496, 337981832271282386432] |