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| n | a(n) |
|---|---|
| 1 | 55 |
| 2 | 1135 |
| 3 | 23815 |
| 4 | 500095 |
| 5 | 10501975 |
| 6 | 220541455 |
| 7 | 4631370535 |
| 8 | 97258781215 |
| 9 | 2042434405495 |
| 10 | 42891122515375 |
| 11 | 900713572822855 |
| 12 | 18914985029279935 |
| 13 | 397214685614878615 |
| 14 | 8341508397912450895 |
| 15 | 175171676356161468775 |
[55,1135,23815,500095,10501975,220541455, 4631370535,97258781215,2042434405495, 42891122515375,900713572822855,18914985029279935, 397214685614878615,8341508397912450895, 175171676356161468775] |