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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 34 |
| 3 | 111 |
| 4 | 866 |
| 5 | 3349 |
| 6 | 21545 |
| 7 | 132202 |
| 8 | 626170 |
| 9 | 3119098 |
| 10 | 18588893 |
| 11 | 109247680 |
| 12 | 581746205 |
| 13 | 3045137702 |
| 14 | 17018115620 |
| 15 | 96581654323 |
| 16 | 529545856166 |
| 17 | 2858809327649 |
| 18 | 15727308156830 |
| 19 | 87667270415711 |
| 20 | 483842000666953 |
| 21 | 2645294630253350 |
[8,34,111,866,3349,21545,132202,626170,3119098, 18588893,109247680,581746205,3045137702, 17018115620,96581654323,529545856166, 2858809327649,15727308156830,87667270415711, 483842000666953,2645294630253350] |