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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 26 |
| 3 | 129 |
| 4 | 419 |
| 5 | 1093 |
| 6 | 2476 |
| 7 | 5069 |
| 8 | 9605 |
| 9 | 17113 |
| 10 | 28990 |
| 11 | 47081 |
| 12 | 73767 |
| 13 | 112061 |
| 14 | 165712 |
| 15 | 239317 |
| 16 | 338441 |
| 17 | 469745 |
| 18 | 641122 |
| 19 | 861841 |
| 20 | 1142699 |
| 21 | 1496181 |
[1,26,129,419,1093,2476,5069,9605,17113,28990, 47081,73767,112061,165712,239317,338441,469745, 641122,861841,1142699,1496181] |