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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 26 |
| 3 | 28 |
| 4 | 76 |
| 5 | 210 |
| 6 | 1801 |
| 7 | 3508 |
| 8 | 16180 |
| 9 | 29286 |
| 10 | 33988 |
| 11 | 1161208 |
| 12 | 4010473 |
| 13 | 164048770 |
| 14 | 18294479654 |
[2,26,28,76,210,1801,3508,16180,29286,33988, 1161208,4010473,164048770,18294479654] |