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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 1531 |
| 3 | 124564 |
| 4 | 6207774 |
| 5 | 256173362 |
| 6 | 9647190761 |
| 7 | 327443433750 |
| 8 | 9777854836324 |
| 9 | 255595250091256 |
| 10 | 5894080544358413 |
| 11 | 121339401663068582 |
| 12 | 2256920347962876651 |
| 13 | 38335567041339845608 |
| 14 | 600100691863091778854 |
| 15 | 8724164918493189698726 |
[4,1531,124564,6207774,256173362,9647190761, 327443433750,9777854836324,255595250091256, 5894080544358413,121339401663068582, 2256920347962876651,38335567041339845608, 600100691863091778854,8724164918493189698726] |