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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 14 |
| 4 | 27 |
| 5 | 48 |
| 6 | 82 |
| 7 | 134 |
| 8 | 215 |
| 9 | 336 |
| 10 | 515 |
| 11 | 773 |
| 12 | 1145 |
| 13 | 1670 |
| 14 | 2406 |
| 15 | 3423 |
| 16 | 4824 |
| 17 | 6730 |
| 18 | 9310 |
| 19 | 12768 |
| 20 | 17385 |
| 21 | 23499 |
| 22 | 31559 |
| 23 | 42111 |
| 24 | 55876 |
| 25 | 73726 |
| 26 | 96784 |
| 27 | 126418 |
| 28 | 164375 |
| 29 | 212772 |
| 30 | 274277 |
| 31 | 352125 |
| 32 | 450365 |
| 33 | 573891 |
| 34 | 728765 |
| 35 | 922305 |
| 36 | 1163530 |
| 37 | 1463287 |
| 38 | 1834842 |
| 39 | 2294128 |
| 40 | 2860538 |
[1,3,7,14,27,48,82,134,215,336,515,773,1145,1670, 2406,3423,4824,6730,9310,12768,17385,23499,31559, 42111,55876,73726,96784,126418,164375,212772, 274277,352125,450365,573891,728765,922305,1163530, 1463287,1834842,2294128,2860538] |