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| n | a(n) |
|---|---|
| 1 | 594 |
| 2 | 992 |
| 3 | 2224 |
| 4 | 8136 |
| 5 | 21984 |
| 6 | 74080 |
| 7 | 274320 |
| 8 | 747456 |
| 9 | 2518720 |
| 10 | 9326880 |
| 11 | 25413504 |
| 12 | 85636480 |
| 13 | 317113920 |
| 14 | 864059136 |
| 15 | 2911640320 |
| 16 | 10781873280 |
| 17 | 29378010624 |
| 18 | 98995770880 |
| 19 | 366583691520 |
| 20 | 998852361216 |
| 21 | 3365856209920 |
| 22 | 12463845511680 |
[594,992,2224,8136,21984,74080,274320,747456, 2518720,9326880,25413504,85636480,317113920, 864059136,2911640320,10781873280,29378010624, 98995770880,366583691520,998852361216, 3365856209920,12463845511680] |