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| n | a(n) |
|---|---|
| 1 | 6709 |
| 2 | 18454 |
| 3 | 71730 |
| 4 | 318274 |
| 5 | 1547711 |
| 6 | 7784629 |
| 7 | 39981376 |
| 8 | 208234989 |
| 9 | 1092285060 |
| 10 | 5754373518 |
| 11 | 30374878110 |
| 12 | 160469301012 |
| 13 | 848397475346 |
| 14 | 4487504454469 |
| 15 | 23739361018235 |
| 16 | 125592863117105 |
| 17 | 664493298038144 |
| 18 | 3515885783465887 |
[6709,18454,71730,318274,1547711,7784629,39981376, 208234989,1092285060,5754373518,30374878110, 160469301012,848397475346,4487504454469, 23739361018235,125592863117105,664493298038144, 3515885783465887] |