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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 12 |
| 3 | 26 |
| 4 | 42 |
| 5 | 183 |
| 6 | 513 |
| 7 | 1085 |
| 8 | 3332 |
| 9 | 9744 |
| 10 | 23836 |
| 11 | 65693 |
| 12 | 187681 |
| 13 | 491757 |
| 14 | 1322824 |
| 15 | 3682514 |
| 16 | 9913750 |
| 17 | 26662827 |
| 18 | 73102697 |
| 19 | 198448393 |
| 20 | 535843320 |
| 21 | 1459128416 |
| 22 | 3966961416 |
| 23 | 10743629897 |
| 24 | 29183372609 |
| 25 | 79314611625 |
| 26 | 215140998420 |
[1,12,26,42,183,513,1085,3332,9744,23836,65693, 187681,491757,1322824,3682514,9913750,26662827, 73102697,198448393,535843320,1459128416, 3966961416,10743629897,29183372609,79314611625, 215140998420] |