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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 71 |
| 3 | 2889 |
| 4 | 164737 |
| 5 | 12082575 |
| 6 | 1083358151 |
| 7 | 114812765781 |
| 8 | 14040770918401 |
| 9 | 1946133989077851 |
| 10 | 301491888156044999 |
| 11 | 51624542295308885793 |
| 12 | 9681761035138427706241 |
| 13 | 1973656779656041723763559 |
| 14 | 434528364117341972641648967 |
| 15 | 102755067271708508826774929325 |
[1,3,71,2889,164737,12082575,1083358151, 114812765781,14040770918401,1946133989077851, 301491888156044999,51624542295308885793, 9681761035138427706241,1973656779656041723763559, 434528364117341972641648967, 102755067271708508826774929325] |