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A042801 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 39 |
| 4 | 41 |
| 5 | 244 |
| 6 | 1505 |
| 7 | 1749 |
| 8 | 3254 |
| 9 | 5003 |
| 10 | 8257 |
| 11 | 21517 |
| 12 | 29774 |
| 13 | 51291 |
| 14 | 81065 |
| 15 | 132356 |
| 16 | 875201 |
| 17 | 4508361 |
| 18 | 5383562 |
| 19 | 106796039 |
| 20 | 112179601 |
| 21 | 218975640 |
| 22 | 13250718001 |
| 23 | 13469693641 |
| 24 | 26720411642 |
| 25 | 521157514839 |
| 26 | 547877926481 |
| 27 | 3260547147244 |
| 28 | 20111160809945 |
| 29 | 23371707957189 |
[1,1,2,39,41,244,1505,1749,3254,5003,8257,21517, 29774,51291,81065,132356,875201,4508361,5383562, 106796039,112179601,218975640,13250718001, 13469693641,26720411642,521157514839,547877926481, 3260547147244,20111160809945,23371707957189] |