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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 321 |
| 3 | 14364 |
| 4 | 751266 |
| 5 | 37402872 |
| 6 | 1899336597 |
| 7 | 95752776009 |
| 8 | 4840082975532 |
| 9 | 244420512852030 |
| 10 | 12347377339339755 |
| 11 | 623671780419814416 |
| 12 | 31503432697236966789 |
| 13 | 1591300459563274835532 |
| 14 | 80380228276030331585859 |
[4,321,14364,751266,37402872,1899336597, 95752776009,4840082975532,244420512852030, 12347377339339755,623671780419814416, 31503432697236966789,1591300459563274835532, 80380228276030331585859] |