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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 34 |
| 4 | 301 |
| 5 | 3277 |
| 6 | 42300 |
| 7 | 631223 |
| 8 | 10688491 |
| 9 | 202450106 |
| 10 | 4240763735 |
| 11 | 97335115799 |
| 12 | 2429137131240 |
| 13 | 65489367427681 |
| 14 | 1896762518271509 |
| 15 | 58734148698989098 |
| 16 | 1936330144548368725 |
| 17 | 67712820910493916277 |
| 18 | 2503438043543726533524 |
| 19 | 97566370877294840891159 |
[0,1,5,34,301,3277,42300,631223,10688491, 202450106,4240763735,97335115799,2429137131240, 65489367427681,1896762518271509,58734148698989098, 1936330144548368725,67712820910493916277, 2503438043543726533524,97566370877294840891159] |