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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 30 |
| 4 | 82 |
| 5 | 199 |
| 6 | 480 |
| 7 | 1097 |
| 8 | 2630 |
| 9 | 5828 |
| 10 | 12830 |
| 11 | 27873 |
| 12 | 60071 |
| 13 | 128355 |
| 14 | 273543 |
| 15 | 580149 |
| 16 | 1226626 |
| 17 | 2584822 |
| 18 | 5433676 |
| 19 | 11392986 |
| 20 | 23838396 |
| 21 | 49776503 |
| 22 | 103755527 |
| 23 | 215904926 |
| 24 | 448602871 |
| 25 | 930771041 |
| 26 | 1928682932 |
| 27 | 3991605129 |
| 28 | 8251710234 |
| 29 | 17040335019 |
| 30 | 35154540729 |
| 31 | 72456654860 |
| 32 | 149208536983 |
[2,11,30,82,199,480,1097,2630,5828,12830,27873, 60071,128355,273543,580149,1226626,2584822, 5433676,11392986,23838396,49776503,103755527, 215904926,448602871,930771041,1928682932, 3991605129,8251710234,17040335019,35154540729, 72456654860,149208536983] |