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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 5 |
| 7 | 8 |
| 8 | 21 |
| 9 | 42 |
| 10 | 98 |
| 11 | 225 |
| 12 | 519 |
| 13 | 1225 |
| 14 | 2888 |
| 15 | 6890 |
| 16 | 16502 |
| 17 | 39726 |
| 18 | 96280 |
| 19 | 234271 |
| 20 | 572113 |
| 21 | 1403155 |
| 22 | 3451023 |
| 23 | 8513549 |
| 24 | 21061621 |
| 25 | 52228567 |
| 26 | 129828588 |
| 27 | 323392155 |
| 28 | 807151015 |
| 29 | 2018271738 |
| 30 | 5055205432 |
| 31 | 12682329400 |
| 32 | 31864376429 |
| 33 | 80171966381 |
| 34 | 201982446435 |
| 35 | 509500029850 |
| 36 | 1286723944862 |
[1,0,1,1,3,5,8,21,42,98,225,519,1225,2888,6890, 16502,39726,96280,234271,572113,1403155,3451023, 8513549,21061621,52228567,129828588,323392155, 807151015,2018271738,5055205432,12682329400, 31864376429,80171966381,201982446435,509500029850, 1286723944862] |