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| n | a(n) |
|---|---|
| 1 | 108 |
| 2 | 268 |
| 3 | 810 |
| 4 | 2242 |
| 5 | 6030 |
| 6 | 16676 |
| 7 | 46154 |
| 8 | 126892 |
| 9 | 349380 |
| 10 | 963126 |
| 11 | 2653330 |
| 12 | 7308822 |
| 13 | 20136340 |
| 14 | 55476206 |
| 15 | 152832896 |
| 16 | 421048884 |
| 17 | 1159980142 |
| 18 | 3195705226 |
| 19 | 8804055846 |
| 20 | 24254890552 |
| 21 | 66821428650 |
| 22 | 184090811336 |
| 23 | 507164105456 |
| 24 | 1397220389014 |
[108,268,810,2242,6030,16676,46154,126892,349380, 963126,2653330,7308822,20136340,55476206, 152832896,421048884,1159980142,3195705226, 8804055846,24254890552,66821428650,184090811336, 507164105456,1397220389014] |