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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 29 |
| 4 | 106 |
| 5 | 396 |
| 6 | 1488 |
| 7 | 5569 |
| 8 | 20859 |
| 9 | 78133 |
| 10 | 292644 |
| 11 | 1096125 |
| 12 | 4105590 |
| 13 | 15377699 |
| 14 | 57598086 |
| 15 | 215736791 |
| 16 | 808054127 |
| 17 | 3026612006 |
| 18 | 11336343903 |
| 19 | 42460908170 |
| 20 | 159039700345 |
| 21 | 595692067467 |
| 22 | 2231197862121 |
| 23 | 8357076036219 |
| 24 | 31301894398172 |
[2,7,29,106,396,1488,5569,20859,78133,292644, 1096125,4105590,15377699,57598086,215736791, 808054127,3026612006,11336343903,42460908170, 159039700345,595692067467,2231197862121, 8357076036219,31301894398172] |