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| n | a(n) |
|---|---|
| 1 | 60 |
| 2 | 642 |
| 3 | 11538 |
| 4 | 144582 |
| 5 | 2663082 |
| 6 | 33590454 |
| 7 | 616998282 |
| 8 | 7808992566 |
| 9 | 142965076362 |
| 10 | 1815370659126 |
| 11 | 33127391927562 |
| 12 | 422008111094454 |
| 13 | 7676351980853898 |
| 14 | 98098336800910134 |
| 15 | 1778822826035815434 |
| 16 | 22802798712088642998 |
[60,642,11538,144582,2663082,33590454,616998282, 7808992566,142965076362,1815370659126, 33127391927562,422008111094454,7676351980853898, 98098336800910134,1778822826035815434, 22802798712088642998] |