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| n | a(n) |
|---|---|
| 1 | 56 |
| 2 | 619 |
| 3 | 32229 |
| 4 | 1306891 |
| 5 | 43792361 |
| 6 | 1222433026 |
| 7 | 29873644925 |
| 8 | 662533943916 |
| 9 | 13515253913829 |
| 10 | 257247067131996 |
| 11 | 4617731855899377 |
| 12 | 78635760906475856 |
| 13 | 1275140440612833310 |
[56,619,32229,1306891,43792361,1222433026, 29873644925,662533943916,13515253913829, 257247067131996,4617731855899377, 78635760906475856,1275140440612833310] |