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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 22428 |
| 3 | 2772906 |
| 4 | 1509045552 |
| 5 | 635678359988 |
| 6 | 270258566366420 |
| 7 | 115824906242444524 |
| 8 | 49485565220035538028 |
| 9 | 21156805616540924557940 |
| 10 | 9044496465346856530533020 |
| 11 | 3866495604500081195895769776 |
[0,22428,2772906,1509045552,635678359988, 270258566366420,115824906242444524, 49485565220035538028,21156805616540924557940, 9044496465346856530533020, 3866495604500081195895769776] |