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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 6 |
| 7 | 17 |
| 8 | 44 |
| 9 | 107 |
| 10 | 252 |
| 11 | 588 |
| 12 | 1376 |
| 13 | 3245 |
| 14 | 7717 |
| 15 | 18485 |
| 16 | 44535 |
| 17 | 107796 |
| 18 | 261937 |
| 19 | 638673 |
| 20 | 1562105 |
| 21 | 3831655 |
| 22 | 9423580 |
| 23 | 23233536 |
| 24 | 57412612 |
| 25 | 142174255 |
| 26 | 352770105 |
| 27 | 876922947 |
| 28 | 2183621209 |
| 29 | 5446177428 |
| 30 | 13603846132 |
| 31 | 34028890577 |
| 32 | 85234251090 |
| 33 | 213760737693 |
| 34 | 536733871490 |
| 35 | 1349210120198 |
[1,1,1,1,1,2,6,17,44,107,252,588,1376,3245,7717, 18485,44535,107796,261937,638673,1562105,3831655, 9423580,23233536,57412612,142174255,352770105, 876922947,2183621209,5446177428,13603846132, 34028890577,85234251090,213760737693,536733871490, 1349210120198] |