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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 2078 |
| 3 | 56646 |
| 4 | 1680927 |
| 5 | 48217515 |
| 6 | 1394258872 |
| 7 | 40337678992 |
| 8 | 1165868818808 |
| 9 | 33712843195488 |
| 10 | 974745141163546 |
| 11 | 28183526319905715 |
| 12 | 814890160500244088 |
| 13 | 23561459156605227616 |
| 14 | 681248846708899731070 |
| 15 | 19697413225479825722690 |
[81,2078,56646,1680927,48217515,1394258872, 40337678992,1165868818808,33712843195488, 974745141163546,28183526319905715, 814890160500244088,23561459156605227616, 681248846708899731070,19697413225479825722690] |