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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 6 |
| 4 | 13 |
| 5 | 32 |
| 6 | 69 |
| 7 | 160 |
| 8 | 344 |
| 9 | 760 |
| 10 | 1601 |
| 11 | 3384 |
| 12 | 7022 |
| 13 | 14434 |
| 14 | 29361 |
| 15 | 59140 |
| 16 | 118089 |
| 17 | 233754 |
| 18 | 459293 |
| 19 | 895382 |
| 20 | 1733904 |
| 21 | 3334914 |
| 22 | 6374654 |
| 23 | 12111632 |
| 24 | 22881777 |
| 25 | 42993244 |
| 26 | 80362496 |
| 27 | 149464404 |
| 28 | 276657082 |
| 29 | 509740278 |
| 30 | 935046158 |
| 31 | 1707916988 |
| 32 | 3106810873 |
| 33 | 5629121054 |
[1,0,2,6,13,32,69,160,344,760,1601,3384,7022, 14434,29361,59140,118089,233754,459293,895382, 1733904,3334914,6374654,12111632,22881777, 42993244,80362496,149464404,276657082,509740278, 935046158,1707916988,3106810873,5629121054] |