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| n | a(n) |
|---|---|
| 1 | 60 |
| 2 | 2124 |
| 3 | 62748 |
| 4 | 1698732 |
| 5 | 43674876 |
| 6 | 1085203980 |
| 7 | 26317946844 |
| 8 | 626778812268 |
| 9 | 14718495557052 |
| 10 | 341767357185996 |
| 11 | 7863372461151900 |
| 12 | 179542238849355564 |
| 13 | 4073026776304945788 |
| 14 | 91888997272241919372 |
| 15 | 2063133077083679521116 |
[60,2124,62748,1698732,43674876,1085203980, 26317946844,626778812268,14718495557052, 341767357185996,7863372461151900, 179542238849355564,4073026776304945788, 91888997272241919372,2063133077083679521116] |