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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 41 |
| 3 | 356 |
| 4 | 2783 |
| 5 | 25118 |
| 6 | 217880 |
| 7 | 1921822 |
| 8 | 16668173 |
| 9 | 146029787 |
| 10 | 1275692776 |
| 11 | 11144916533 |
| 12 | 97386223456 |
| 13 | 850945201900 |
| 14 | 7435399467018 |
| 15 | 64968547774607 |
| 16 | 567683242015249 |
| 17 | 4960297439355274 |
| 18 | 43342029653468635 |
| 19 | 378713657086113296 |
[1,41,356,2783,25118,217880,1921822,16668173, 146029787,1275692776,11144916533,97386223456, 850945201900,7435399467018,64968547774607, 567683242015249,4960297439355274, 43342029653468635,378713657086113296] |