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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 74 |
| 3 | 2320 |
| 4 | 77830 |
| 5 | 2595190 |
| 6 | 94930586 |
| 7 | 3708826784 |
| 8 | 148879349035 |
| 9 | 6098536482216 |
| 10 | 255081230000786 |
| 11 | 10848711502940592 |
| 12 | 467125765450160196 |
| 13 | 20321101379722519804 |
| 14 | 892020118445773622883 |
| 15 | 39459836156094190716464 |
[6,74,2320,77830,2595190,94930586,3708826784, 148879349035,6098536482216,255081230000786, 10848711502940592,467125765450160196, 20321101379722519804,892020118445773622883, 39459836156094190716464] |