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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 100 |
| 3 | 1208 |
| 4 | 14554 |
| 5 | 175352 |
| 6 | 2112772 |
| 7 | 25456328 |
| 8 | 306717703 |
| 9 | 3695574048 |
| 10 | 44527157584 |
| 11 | 536497912672 |
| 12 | 6464145163032 |
| 13 | 77885061063584 |
| 14 | 938419943222768 |
| 15 | 11306815168562400 |
| 16 | 136233325153964242 |
| 17 | 1641445323534504928 |
| 18 | 19777413104380161776 |
| 19 | 238293693669343744032 |
[1,8,100,1208,14554,175352,2112772,25456328, 306717703,3695574048,44527157584,536497912672, 6464145163032,77885061063584,938419943222768, 11306815168562400,136233325153964242, 1641445323534504928,19777413104380161776, 238293693669343744032] |