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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 5 |
| 2 | 7 |
| 3 | 76 |
| 4 | 18 |
| 5 | 1281 |
| 6 | 1872 |
| 7 | 19850 |
| 8 | 5518 |
| 9 | 334438 |
| 10 | 470902 |
| 11 | 4989654 |
| 12 | 1187177 |
| 13 | 83965631 |
| 14 | 122705027 |
| 15 | 1300996004 |
| 16 | 361349378 |
| 17 | 21919223969 |
| 18 | 30854252783 |
| 19 | 327011301795 |
| 20 | 77754211611 |
[0,5,7,76,18,1281,1872,19850,5518,334438,470902, 4989654,1187177,83965631,122705027,1300996004, 361349378,21919223969,30854252783,327011301795, 77754211611] |