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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 25 |
| 5 | 541 |
| 6 | 3361 |
| 7 | 135451 |
| 8 | 1179697 |
| 9 | 72062425 |
| 10 | 800549281 |
| 11 | 66556219951 |
| 12 | 895033831561 |
| 13 | 94883671398517 |
| 14 | 1494100965599425 |
| 15 | 193406329375101571 |
| 16 | 3484870135007879521 |
| 17 | 534176530923146533681 |
| 18 | 10828212525851495841217 |
| 19 | 1921147013664776094354775 |
| 20 | 43243444110218718242048761 |
| 21 | 8725818848745836121239731021 |
| 22 | 215849236633217233817102676961 |
| 23 | 48851798675231712377778383815147 |
[1,1,1,7,25,541,3361,135451,1179697,72062425, 800549281,66556219951,895033831561,94883671398517, 1494100965599425,193406329375101571, 3484870135007879521,534176530923146533681, 10828212525851495841217,1921147013664776094354775, 43243444110218718242048761, 8725818848745836121239731021, 215849236633217233817102676961, 48851798675231712377778383815147] |