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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 22 |
| 4 | 51 |
| 5 | 114 |
| 6 | 230 |
| 7 | 468 |
| 8 | 885 |
| 9 | 1674 |
| 10 | 3045 |
| 11 | 5418 |
| 12 | 9560 |
| 13 | 16341 |
| 14 | 27912 |
| 15 | 46383 |
| 16 | 76794 |
| 17 | 125205 |
| 18 | 201580 |
| 19 | 322980 |
| 20 | 508710 |
| 21 | 800495 |
| 22 | 1241190 |
| 23 | 1916682 |
| 24 | 2935492 |
| 25 | 4456617 |
| 26 | 6747393 |
| 27 | 10101532 |
| 28 | 15105042 |
| 29 | 22378362 |
| 30 | 33035166 |
| 31 | 48520809 |
| 32 | 70776711 |
| 33 | 103072393 |
| 34 | 148899756 |
[1,3,9,22,51,114,230,468,885,1674,3045,5418,9560, 16341,27912,46383,76794,125205,201580,322980, 508710,800495,1241190,1916682,2935492,4456617, 6747393,10101532,15105042,22378362,33035166, 48520809,70776711,103072393,148899756] |