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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 32 |
| 4 | 300 |
| 5 | 3533 |
| 6 | 51650 |
| 7 | 894929 |
| 8 | 17981196 |
| 9 | 410826036 |
| 10 | 10518152538 |
| 11 | 298209605418 |
| 12 | 9273131902539 |
| 13 | 313758357802886 |
| 14 | 11474239675400172 |
| 15 | 450962279143408815 |
| 16 | 18954601400362304902 |
| 17 | 848385358833157331498 |
| 18 | 40285279861744621069122 |
[1,1,5,32,300,3533,51650,894929,17981196, 410826036,10518152538,298209605418,9273131902539, 313758357802886,11474239675400172, 450962279143408815,18954601400362304902, 848385358833157331498,40285279861744621069122] |