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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 44 |
| 3 | 1713 |
| 4 | 34348 |
| 5 | 468496 |
| 6 | 4888659 |
| 7 | 41698446 |
| 8 | 303361302 |
| 9 | 1938464178 |
| 10 | 11113364813 |
| 11 | 58083296635 |
| 12 | 280168918756 |
| 13 | 1259424247108 |
| 14 | 5317482568472 |
| 15 | 21222955187222 |
| 16 | 80498197428443 |
| 17 | 291472386647409 |
| 18 | 1011352733367759 |
[0,44,1713,34348,468496,4888659,41698446, 303361302,1938464178,11113364813,58083296635, 280168918756,1259424247108,5317482568472, 21222955187222,80498197428443,291472386647409, 1011352733367759] |