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A339838 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 27 |
| 6 | 75 |
| 7 | 221 |
| 8 | 662 |
| 9 | 2042 |
| 10 | 6402 |
| 11 | 20407 |
| 12 | 65828 |
| 13 | 214720 |
| 14 | 706600 |
| 15 | 2343767 |
| 16 | 7826752 |
| 17 | 26293468 |
| 18 | 88796471 |
| 19 | 301290197 |
| 20 | 1026595232 |
| 21 | 3511246069 |
| 22 | 12050780294 |
| 23 | 41488523002 |
| 24 | 143246116231 |
| 25 | 495881545520 |
| 26 | 1720771421470 |
| 27 | 5984652387281 |
| 28 | 20857113949868 |
| 29 | 72829214554641 |
| 30 | 254762923125929 |
[1,2,4,10,27,75,221,662,2042,6402,20407,65828, 214720,706600,2343767,7826752,26293468,88796471, 301290197,1026595232,3511246069,12050780294, 41488523002,143246116231,495881545520, 1720771421470,5984652387281,20857113949868, 72829214554641,254762923125929] |