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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 28 |
| 2 | 523 |
| 3 | 8218 |
| 4 | 117649 |
| 5 | 1592416 |
| 6 | 20790631 |
| 7 | 264958246 |
| 8 | 3320750557 |
| 9 | 41132364364 |
| 10 | 505211150899 |
| 11 | 6167574174034 |
| 12 | 74958865496425 |
| 13 | 908053837462072 |
| 14 | 10973667150086527 |
| 15 | 132377759927894782 |
| 16 | 1594780291608334453 |
[1,28,523,8218,117649,1592416,20790631,264958246, 3320750557,41132364364,505211150899,6167574174034, 74958865496425,908053837462072,10973667150086527, 132377759927894782,1594780291608334453] |