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| n | a(n) |
|---|---|
| 1 | 84 |
| 2 | 546 |
| 3 | 3552 |
| 4 | 23154 |
| 5 | 151218 |
| 6 | 989484 |
| 7 | 6486618 |
| 8 | 42598386 |
| 9 | 280208436 |
| 10 | 1845953430 |
| 11 | 12177085710 |
| 12 | 80422381488 |
| 13 | 531677196078 |
| 14 | 3517904882982 |
| 15 | 23292441203544 |
| 16 | 154303014921810 |
| 17 | 1022587652767170 |
| 18 | 6778549963517052 |
| 19 | 44939890595804202 |
[84,546,3552,23154,151218,989484,6486618,42598386, 280208436,1845953430,12177085710,80422381488, 531677196078,3517904882982,23292441203544, 154303014921810,1022587652767170,6778549963517052, 44939890595804202] |