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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 33 |
| 5 | 1153 |
| 6 | 266337 |
| 7 | 2149605893 |
| 8 | 4007637093066433 |
| 9 | 60303882185826956720761345 |
| 10 | 1691732525726797389070758961468800814420801 |
| 11 | 714126272449521825808382965880022542720530687818734820147878380094981 |
[1,1,1,5,33,1153,266337,2149605893, 4007637093066433,60303882185826956720761345, 1691732525726797389070758961468800814420801, 71412627244952182580838296588002254272053068781873\ 4820147878380094981] |