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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 2 |
| 11 | 3 |
| 12 | 4 |
| 13 | 5 |
| 14 | 6 |
| 15 | 10 |
| 16 | 19 |
| 17 | 35 |
| 18 | 60 |
| 19 | 156 |
| 20 | 284 |
| 21 | 499 |
| 22 | 930 |
| 23 | 1836 |
| 24 | 7116 |
| 25 | 21586 |
| 26 | 52869 |
| 27 | 115344 |
| 28 | 356076 |
| 29 | 972840 |
| 30 | 3350009 |
| 31 | 11844969 |
| 32 | 37689894 |
| 33 | 215136930 |
| 34 | 785604755 |
| 35 | 2444023816 |
| 36 | 7985904285 |
| 37 | 36968693334 |
| 38 | 230985863335 |
| 39 | 1429813280831 |
| 40 | 6838592493455 |
| 41 | 27144055289355 |
| 42 | 191201731942399 |
[1,1,1,1,1,1,1,1,1,1,2,3,4,5,6,10,19,35,60,156, 284,499,930,1836,7116,21586,52869,115344,356076, 972840,3350009,11844969,37689894,215136930, 785604755,2444023816,7985904285,36968693334, 230985863335,1429813280831,6838592493455, 27144055289355,191201731942399] |