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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 126 |
| 6 | 14 |
| 7 | 16808 |
| 8 | 522 |
| 9 | 59059 |
| 10 | 2002 |
| 11 | 2357947692 |
| 12 | 1766 |
| 13 | 1792160394038 |
| 14 | 1075650 |
| 15 | 170862766 |
| 16 | 268439570 |
| 17 | 2862423051509815794 |
| 18 | 3779174 |
| 19 | 5480386857784802185940 |
| 20 | 1280016022 |
| 21 | 350277504626344 |
| 22 | 2414538435586 |
| 23 | 39471584120695485887249589624 |
| 24 | 4586499146 |
[1,2,4,6,126,14,16808,522,59059,2002,2357947692, 1766,1792160394038,1075650,170862766,268439570, 2862423051509815794,3779174, 5480386857784802185940,1280016022,350277504626344, 2414538435586,39471584120695485887249589624, 4586499146] |