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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 329 |
| 3 | 164410 |
| 4 | 217010257 |
| 5 | 592437912176 |
| 6 | 2900576017215049 |
| 7 | 23146596617368286854 |
| 8 | 281092269321320392419425 |
| 9 | 4933169326589172885999647452 |
| 10 | 120172004795712251502939402381001 |
| 11 | 3933950748992436265200224114943085394 |
| 12 | 168530450086835969601177601081838249796529 |
[1,4,329,164410,217010257,592437912176, 2900576017215049,23146596617368286854, 281092269321320392419425, 4933169326589172885999647452, 120172004795712251502939402381001, 3933950748992436265200224114943085394, 168530450086835969601177601081838249796529] |