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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 13448 |
| 3 | 0 |
| 4 | 30150416 |
| 5 | 0 |
| 6 | 27063010712 |
| 7 | 0 |
| 8 | 13032761962016 |
| 9 | 0 |
| 10 | 3913291362389672 |
| 11 | 0 |
| 12 | 803284881791282480 |
| 13 | 0 |
| 14 | 119978383321782198200 |
| 15 | 0 |
| 16 | 13641020048513471601728 |
| 17 | 0 |
| 18 | 1221725104670456390191304 |
| 19 | 0 |
| 20 | 88546015593657513545141072 |
| 21 | 0 |
| 22 | 5307256748692946318313380312 |
| 23 | 0 |
| 24 | 267833718693896594307599764064 |
| 25 | 0 |
[1,0,13448,0,30150416,0,27063010712,0, 13032761962016,0,3913291362389672,0, 803284881791282480,0,119978383321782198200,0, 13641020048513471601728,0, 1221725104670456390191304,0, 88546015593657513545141072,0, 5307256748692946318313380312,0, 267833718693896594307599764064,0] |