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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 32 |
| 4 | 69 |
| 5 | 308 |
| 6 | 1444 |
| 7 | 5048 |
| 8 | 20265 |
| 9 | 83277 |
| 10 | 322864 |
| 11 | 1280598 |
| 12 | 5112008 |
| 13 | 20189827 |
| 14 | 80032884 |
| 15 | 317712722 |
| 16 | 1258773307 |
| 17 | 4990157041 |
| 18 | 19788837323 |
| 19 | 78445935632 |
| 20 | 310998937948 |
| 21 | 1233039388705 |
| 22 | 4888402255720 |
| 23 | 19380385472489 |
| 24 | 76835860723308 |
[1,3,32,69,308,1444,5048,20265,83277,322864, 1280598,5112008,20189827,80032884,317712722, 1258773307,4990157041,19788837323,78445935632, 310998937948,1233039388705,4888402255720, 19380385472489,76835860723308] |