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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 37 |
| 5 | 44 |
| 6 | 257 |
| 7 | 815 |
| 8 | 1072 |
| 9 | 1887 |
| 10 | 102970 |
| 11 | 104857 |
| 12 | 207827 |
| 13 | 728338 |
| 14 | 3849517 |
| 15 | 4577855 |
| 16 | 26738792 |
| 17 | 84794231 |
| 18 | 111533023 |
| 19 | 196327254 |
| 20 | 10713204739 |
| 21 | 10909531993 |
| 22 | 21622736732 |
| 23 | 75777742189 |
| 24 | 400511447677 |
| 25 | 476289189866 |
| 26 | 2781957397007 |
| 27 | 8822161380887 |
| 28 | 11604118777894 |
[1,1,2,7,37,44,257,815,1072,1887,102970,104857, 207827,728338,3849517,4577855,26738792,84794231, 111533023,196327254,10713204739,10909531993, 21622736732,75777742189,400511447677,476289189866, 2781957397007,8822161380887,11604118777894] |