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| n | a(n) |
|---|---|
| 1 | 14 |
| 2 | 64 |
| 3 | 396 |
| 4 | 2564 |
| 5 | 17036 |
| 6 | 114184 |
| 7 | 767400 |
| 8 | 5162348 |
| 9 | 34738608 |
| 10 | 233788948 |
| 11 | 1573443364 |
| 12 | 10589696164 |
| 13 | 71271786592 |
| 14 | 479680852000 |
| 15 | 3228399847820 |
| 16 | 21728128472720 |
| 17 | 146237025626140 |
| 18 | 984220433953220 |
| 19 | 6624108115567212 |
[14,64,396,2564,17036,114184,767400,5162348, 34738608,233788948,1573443364,10589696164, 71271786592,479680852000,3228399847820, 21728128472720,146237025626140,984220433953220, 6624108115567212] |