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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 304 |
| 3 | 5160 |
| 4 | 224767 |
| 5 | 8265835 |
| 6 | 340365586 |
| 7 | 13715723327 |
| 8 | 560932609225 |
| 9 | 22881004568048 |
| 10 | 935477482098150 |
| 11 | 38230695664365356 |
| 12 | 1562893013715392478 |
| 13 | 63887739349054144930 |
| 14 | 2611714583994197727657 |
| 15 | 106765154994098448490632 |
[1,304,5160,224767,8265835,340365586,13715723327, 560932609225,22881004568048,935477482098150, 38230695664365356,1562893013715392478, 63887739349054144930,2611714583994197727657, 106765154994098448490632] |