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| n | a(n) |
|---|---|
| 1 | 56 |
| 2 | 554 |
| 3 | 6474 |
| 4 | 86416 |
| 5 | 1218778 |
| 6 | 17692662 |
| 7 | 260746932 |
| 8 | 3870426602 |
| 9 | 57837221756 |
| 10 | 869215927390 |
| 11 | 13123761537778 |
| 12 | 198920666858552 |
| 13 | 3025059739988546 |
| 14 | 46133139520964090 |
| 15 | 705259604715611042 |
| 16 | 10804567651956071366 |
[56,554,6474,86416,1218778,17692662,260746932, 3870426602,57837221756,869215927390, 13123761537778,198920666858552,3025059739988546, 46133139520964090,705259604715611042, 10804567651956071366] |