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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 39 |
| 4 | 508 |
| 5 | 9235 |
| 6 | 224481 |
| 7 | 6959932 |
| 8 | 266492388 |
| 9 | 12302514945 |
| 10 | 671505310855 |
| 11 | 42664357009186 |
| 12 | 3114726872133570 |
| 13 | 258452373177094213 |
| 14 | 24149855477595375815 |
| 15 | 2520813303733886387220 |
| 16 | 291892618561012451083816 |
| 17 | 37264133443594227118861233 |
| 18 | 5216461719269145457350349359 |
[1,1,5,39,508,9235,224481,6959932,266492388, 12302514945,671505310855,42664357009186, 3114726872133570,258452373177094213, 24149855477595375815,2520813303733886387220, 291892618561012451083816, 37264133443594227118861233, 5216461719269145457350349359] |