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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 211 |
| 3 | 550 |
| 4 | 1517 |
| 5 | 4227 |
| 6 | 12072 |
| 7 | 34817 |
| 8 | 101881 |
| 9 | 300694 |
| 10 | 896941 |
| 11 | 2695583 |
| 12 | 8170608 |
| 13 | 24926541 |
| 14 | 76581709 |
| 15 | 236571526 |
| 16 | 735006969 |
| 17 | 2293934715 |
| 18 | 7192276024 |
| 19 | 22632537625 |
| 20 | 71477629985 |
| 21 | 226390525302 |
| 22 | 719056784565 |
| 23 | 2288987001383 |
| 24 | 7302243641824 |
[81,211,550,1517,4227,12072,34817,101881,300694, 896941,2695583,8170608,24926541,76581709, 236571526,735006969,2293934715,7192276024, 22632537625,71477629985,226390525302,719056784565, 2288987001383,7302243641824] |