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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 8 |
| 6 | 17 |
| 7 | 28 |
| 8 | 41 |
| 9 | 56 |
| 10 | 144 |
| 11 | 317 |
| 12 | 609 |
| 13 | 1060 |
| 14 | 1716 |
| 15 | 3324 |
| 16 | 6713 |
| 17 | 13188 |
| 18 | 24624 |
| 19 | 43620 |
| 20 | 80464 |
| 21 | 153645 |
| 22 | 296025 |
| 23 | 562097 |
| 24 | 1037921 |
| 25 | 1920661 |
| 26 | 3600832 |
| 27 | 6820873 |
| 28 | 12920804 |
| 29 | 24211457 |
| 30 | 45173688 |
| 31 | 84493668 |
| 32 | 158848825 |
| 33 | 299451277 |
| 34 | 562923960 |
| 35 | 1055117520 |
| 36 | 1976475968 |
[1,1,1,1,1,8,17,28,41,56,144,317,609,1060,1716, 3324,6713,13188,24624,43620,80464,153645,296025, 562097,1037921,1920661,3600832,6820873,12920804, 24211457,45173688,84493668,158848825,299451277, 562923960,1055117520,1976475968] |