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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 200 |
| 4 | 4808 |
| 5 | 174752 |
| 6 | 8948384 |
| 7 | 614111360 |
| 8 | 54420050048 |
| 9 | 6049980273152 |
| 10 | 824598462370304 |
| 11 | 135229597964011520 |
| 12 | 26270107716700325888 |
| 13 | 5966042534096492797952 |
| 14 | 1566190258767667468673024 |
| 15 | 470646643220470846599495680 |
| 16 | 160520698699963165307893219328 |
| 17 | 61671685329051568727390505009152 |
| 18 | 26512964135663506964369113425772544 |
| 19 | 12678129819059978095225581054619811840 |
[1,2,14,200,4808,174752,8948384,614111360, 54420050048,6049980273152,824598462370304, 135229597964011520,26270107716700325888, 5966042534096492797952,1566190258767667468673024, 470646643220470846599495680, 160520698699963165307893219328, 61671685329051568727390505009152, 26512964135663506964369113425772544, 12678129819059978095225581054619811840] |