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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 26 |
| 4 | 376 |
| 5 | 7614 |
| 6 | 198248 |
| 7 | 6309092 |
| 8 | 237291388 |
| 9 | 10297903920 |
| 10 | 506495785632 |
| 11 | 27842563031304 |
| 12 | 1691646018671376 |
| 13 | 112569103111005072 |
| 14 | 8142200129607522288 |
| 15 | 636046143210331062048 |
| 16 | 53366672768969064921024 |
[1,3,26,376,7614,198248,6309092,237291388, 10297903920,506495785632,27842563031304, 1691646018671376,112569103111005072, 8142200129607522288,636046143210331062048, 53366672768969064921024] |