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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 15 |
| 6 | 32 |
| 7 | 61 |
| 8 | 121 |
| 9 | 260 |
| 10 | 498 |
| 11 | 967 |
| 12 | 1890 |
| 13 | 3603 |
| 14 | 6839 |
| 15 | 12972 |
| 16 | 23883 |
| 17 | 44636 |
| 18 | 82705 |
| 19 | 150904 |
| 20 | 275635 |
| 21 | 501737 |
| 22 | 905498 |
| 23 | 1628293 |
| 24 | 2922580 |
| 25 | 5224991 |
| 26 | 9296414 |
| 27 | 16482995 |
| 28 | 29125140 |
| 29 | 51287098 |
| 30 | 90171414 |
| 31 | 157704275 |
| 32 | 275419984 |
| 33 | 479683837 |
| 34 | 833154673 |
| 35 | 1442550486 |
| 36 | 2493570655 |
[0,1,2,4,7,15,32,61,121,260,498,967,1890,3603, 6839,12972,23883,44636,82705,150904,275635,501737, 905498,1628293,2922580,5224991,9296414,16482995, 29125140,51287098,90171414,157704275,275419984, 479683837,833154673,1442550486,2493570655] |