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| n | a(n) |
|---|---|
| 1 | 640495 |
| 2 | 1155440875 |
| 3 | 2070471867089 |
| 4 | 3709556186877991 |
| 5 | 6646136755091102809 |
| 6 | 11907389873495805482147 |
| 7 | 21333585909890026502784395 |
| 8 | 38221801163314869070882625309 |
| 9 | 68479161927863057179564432736483 |
[640495,1155440875,2070471867089,3709556186877991, 6646136755091102809,11907389873495805482147, 21333585909890026502784395, 38221801163314869070882625309, 68479161927863057179564432736483] |