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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 25 |
| 6 | 46 |
| 7 | 86 |
| 8 | 158 |
| 9 | 292 |
| 10 | 537 |
| 11 | 989 |
| 12 | 1819 |
| 13 | 3347 |
| 14 | 6156 |
| 15 | 11324 |
| 16 | 20828 |
| 17 | 38310 |
| 18 | 70463 |
| 19 | 129603 |
| 20 | 238377 |
| 21 | 438445 |
| 22 | 806426 |
| 23 | 1483250 |
| 24 | 2728122 |
| 25 | 5017800 |
| 26 | 9229173 |
| 27 | 16975097 |
| 28 | 31222071 |
| 29 | 57426343 |
| 30 | 105623512 |
| 31 | 194271928 |
| 32 | 357321784 |
| 33 | 657217226 |
| 34 | 1208810939 |
| 35 | 2223349951 |
| 36 | 4089378117 |
[2,3,7,13,25,46,86,158,292,537,989,1819,3347,6156, 11324,20828,38310,70463,129603,238377,438445, 806426,1483250,2728122,5017800,9229173,16975097, 31222071,57426343,105623512,194271928,357321784, 657217226,1208810939,2223349951,4089378117] |