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| n | a(n) |
|---|---|
| 1 | 42 |
| 2 | 1764 |
| 3 | 8928 |
| 4 | 47320 |
| 5 | 231900 |
| 6 | 1153532 |
| 7 | 5888458 |
| 8 | 29719004 |
| 9 | 148308700 |
| 10 | 747498440 |
| 11 | 3783114924 |
| 12 | 19018273952 |
| 13 | 95539877180 |
| 14 | 481930389188 |
| 15 | 2429549328924 |
| 16 | 12220600155324 |
| 17 | 61525298964898 |
| 18 | 310087031694592 |
| 19 | 1561597935502608 |
[42,1764,8928,47320,231900,1153532,5888458, 29719004,148308700,747498440,3783114924, 19018273952,95539877180,481930389188, 2429549328924,12220600155324,61525298964898, 310087031694592,1561597935502608] |