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| n | a(n) |
|---|---|
| 1 | 119904 |
| 2 | 233016 |
| 3 | 423072 |
| 4 | 972888 |
| 5 | 2072256 |
| 6 | 5395128 |
| 7 | 13083552 |
| 8 | 37239960 |
| 9 | 99668544 |
| 10 | 302942136 |
| 11 | 872803872 |
| 12 | 2789946648 |
| 13 | 8503198656 |
| 14 | 28292814648 |
| 15 | 90149814432 |
| 16 | 309941744280 |
| 17 | 1023953849664 |
| 18 | 3617288003256 |
| 19 | 12314264477472 |
| 20 | 44498943619608 |
[119904,233016,423072,972888,2072256,5395128, 13083552,37239960,99668544,302942136,872803872, 2789946648,8503198656,28292814648,90149814432, 309941744280,1023953849664,3617288003256, 12314264477472,44498943619608] |