| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 15 |
| 3 | 110 |
| 4 | 965 |
| 5 | 9376 |
| 6 | 97775 |
| 7 | 1068450 |
| 8 | 12081605 |
| 9 | 140160650 |
| 10 | 1658936806 |
| 11 | 19953117520 |
| 12 | 243173225615 |
| 13 | 2996409047690 |
| 14 | 37268293795255 |
| 15 | 467259511562294 |
| 16 | 5899263870621530 |
| 17 | 74934997567372640 |
| 18 | 956996551484947905 |
| 19 | 12280538887616448930 |
| 20 | 158266409616840974927 |
[5,15,110,965,9376,97775,1068450,12081605, 140160650,1658936806,19953117520,243173225615, 2996409047690,37268293795255,467259511562294, 5899263870621530,74934997567372640, 956996551484947905,12280538887616448930, 158266409616840974927] |