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| n | a(n) |
|---|---|
| 1 | 42 |
| 2 | 504 |
| 3 | 8796 |
| 4 | 53298 |
| 5 | 566412 |
| 6 | 1341756 |
| 7 | 5312160 |
| 8 | 9373536 |
| 9 | 24790458 |
| 10 | 80346588 |
| 11 | 112613886 |
| 12 | 275440284 |
| 13 | 462452448 |
| 14 | 588037212 |
| 15 | 920759046 |
| 16 | 1686448764 |
| 17 | 2893307844 |
| 18 | 3421602972 |
| 19 | 5484429720 |
| 20 | 7340452434 |
| 21 | 8440231968 |
| 22 | 12551864598 |
| 23 | 16086117120 |
| 24 | 22838112000 |
| 25 | 35181089856 |
[42,504,8796,53298,566412,1341756,5312160,9373536, 24790458,80346588,112613886,275440284,462452448, 588037212,920759046,1686448764,2893307844, 3421602972,5484429720,7340452434,8440231968, 12551864598,16086117120,22838112000,35181089856] |