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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 10 |
| 5 | 24 |
| 6 | 52 |
| 7 | 105 |
| 8 | 238 |
| 9 | 495 |
| 10 | 1068 |
| 11 | 2304 |
| 12 | 4893 |
| 13 | 10556 |
| 14 | 22570 |
| 15 | 48363 |
| 16 | 103805 |
| 17 | 222224 |
| 18 | 476634 |
| 19 | 1021515 |
| 20 | 2189200 |
| 21 | 4693415 |
| 22 | 10058607 |
| 23 | 21561120 |
| 24 | 46215400 |
| 25 | 99056688 |
| 26 | 212327858 |
| 27 | 455105352 |
| 28 | 975492413 |
| 29 | 2090916520 |
| 30 | 4481729501 |
| 31 | 9606342690 |
| 32 | 20590584676 |
| 33 | 44134642493 |
| 34 | 94599971180 |
[1,1,2,6,10,24,52,105,238,495,1068,2304,4893, 10556,22570,48363,103805,222224,476634,1021515, 2189200,4693415,10058607,21561120,46215400, 99056688,212327858,455105352,975492413,2090916520, 4481729501,9606342690,20590584676,44134642493, 94599971180] |