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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 19 |
| 4 | 42 |
| 5 | 81 |
| 6 | 155 |
| 7 | 276 |
| 8 | 486 |
| 9 | 821 |
| 10 | 1368 |
| 11 | 2214 |
| 12 | 3541 |
| 13 | 5544 |
| 14 | 8586 |
| 15 | 13082 |
| 16 | 19740 |
| 17 | 29403 |
| 18 | 43414 |
| 19 | 63423 |
| 20 | 91935 |
| 21 | 132075 |
| 22 | 188418 |
| 23 | 266733 |
| 24 | 375232 |
| 25 | 524331 |
| 26 | 728514 |
| 27 | 1006216 |
| 28 | 1382604 |
| 29 | 1889739 |
| 30 | 2570719 |
| 31 | 3480420 |
| 32 | 4691682 |
| 33 | 6297102 |
| 34 | 8418252 |
| 35 | 11209347 |
| 36 | 14870970 |
[1,3,9,19,42,81,155,276,486,821,1368,2214,3541, 5544,8586,13082,19740,29403,43414,63423,91935, 132075,188418,266733,375232,524331,728514,1006216, 1382604,1889739,2570719,3480420,4691682,6297102, 8418252,11209347,14870970] |