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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 576 |
| 3 | 20992 |
| 4 | 765952 |
| 5 | 27951104 |
| 6 | 1020002304 |
| 7 | 37222350848 |
| 8 | 1358333739008 |
| 9 | 49568888651776 |
| 10 | 1808888827478016 |
| 11 | 66010735351693312 |
| 12 | 2408891644150546432 |
| 13 | 87906291641005113344 |
| 14 | 3207913535188934590464 |
| 15 | 117064536077508729110528 |
[16,576,20992,765952,27951104,1020002304, 37222350848,1358333739008,49568888651776, 1808888827478016,66010735351693312, 2408891644150546432,87906291641005113344, 3207913535188934590464,117064536077508729110528] |