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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 87 |
| 5 | 1577 |
| 6 | 37921 |
| 7 | 1143991 |
| 8 | 41734167 |
| 9 | 1793837945 |
| 10 | 89100737537 |
| 11 | 5038278258759 |
| 12 | 320488252355991 |
| 13 | 22712229678267017 |
| 14 | 1778818548078114337 |
| 15 | 152926844472960316055 |
| 16 | 14348332105800041202903 |
| 17 | 1461880180517958608890585 |
| 18 | 161034066043430013259095681 |
| 19 | 19105043857756090069661974951 |
| 20 | 2432865068875486088572762200535 |
| 21 | 331511875063241457659846364208233 |
| 22 | 48205214775404458968179455649349921 |
| 23 | 7461345443274460130807423699070922103 |
[1,1,7,87,1577,37921,1143991,41734167,1793837945, 89100737537,5038278258759,320488252355991, 22712229678267017,1778818548078114337, 152926844472960316055,14348332105800041202903, 1461880180517958608890585, 161034066043430013259095681, 19105043857756090069661974951, 2432865068875486088572762200535, 331511875063241457659846364208233, 48205214775404458968179455649349921, 7461345443274460130807423699070922103] |