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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 900 |
| 3 | 295264 |
| 4 | 54113236 |
| 5 | 10523263424 |
| 6 | 2184414516364 |
| 7 | 446454227170968 |
| 8 | 90637093836201284 |
| 9 | 18447462299508458652 |
| 10 | 3757678170703167716673 |
| 11 | 765103415743509162801632 |
| 12 | 155767055441358236289145024 |
[4,900,295264,54113236,10523263424,2184414516364, 446454227170968,90637093836201284, 18447462299508458652,3757678170703167716673, 765103415743509162801632, 155767055441358236289145024] |