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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 1201 |
| 3 | 60779 |
| 4 | 2883705 |
| 5 | 150408381 |
| 6 | 7919440725 |
| 7 | 414777995952 |
| 8 | 21727028378285 |
| 9 | 1138816744364625 |
| 10 | 59691195859395408 |
| 11 | 3128607573114280589 |
| 12 | 163981279662396372799 |
| 13 | 8594866332548915855696 |
| 14 | 450488649723690452933920 |
[21,1201,60779,2883705,150408381,7919440725, 414777995952,21727028378285,1138816744364625, 59691195859395408,3128607573114280589, 163981279662396372799,8594866332548915855696, 450488649723690452933920] |