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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 16 |
| 4 | 129 |
| 5 | 4273 |
| 6 | 217880 |
| 7 | 23946130 |
| 8 | 5094296927 |
| 9 | 2171426372387 |
| 10 | 1837082082523359 |
| 11 | 3094534584891471987 |
| 12 | 10360619358796873163844 |
| 13 | 68989834793646571143250669 |
| 14 | 913590557002024874434691467840 |
[1,1,16,129,4273,217880,23946130,5094296927, 2171426372387,1837082082523359, 3094534584891471987,10360619358796873163844, 68989834793646571143250669, 913590557002024874434691467840] |