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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 19 |
| 4 | 118 |
| 5 | 1085 |
| 6 | 14414 |
| 7 | 289494 |
| 8 | 8474549 |
| 9 | 367622030 |
| 10 | 23768683063 |
| 11 | 2264991184042 |
| 12 | 321683159101264 |
| 13 | 67771416854833971 |
| 14 | 21147805661160867290 |
| 15 | 9831636745023577739551 |
| 16 | 6777168866402222336954286 |
[1,3,19,118,1085,14414,289494,8474549,367622030, 23768683063,2264991184042,321683159101264, 67771416854833971,21147805661160867290, 9831636745023577739551,6777168866402222336954286] |