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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 14 |
| 2 | 182 |
| 3 | 2470 |
| 4 | 34580 |
| 5 | 494760 |
| 6 | 7191690 |
| 7 | 105793545 |
| 8 | 1570873850 |
| 9 | 23500272796 |
| 10 | 353724885332 |
| 11 | 5351515200668 |
| 12 | 81313973049064 |
| 13 | 1240116577389200 |
| 14 | 18973783634054760 |
| 15 | 291115203548084370 |
| 16 | 4477664537437798980 |
| 17 | 69023046543088792440 |
| 18 | 1066084706728274263800 |
| 19 | 16495237916832025427160 |
| 20 | 255635559046076610807120 |
[1,14,182,2470,34580,494760,7191690,105793545, 1570873850,23500272796,353724885332,5351515200668, 81313973049064,1240116577389200,18973783634054760, 291115203548084370,4477664537437798980, 69023046543088792440,1066084706728274263800, 16495237916832025427160,255635559046076610807120] |