| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 46 |
| 2 | 1035 |
| 3 | 15180 |
| 4 | 163185 |
| 5 | 1370754 |
| 6 | 9366819 |
| 7 | 53524680 |
| 8 | 260932815 |
| 9 | 1101716330 |
| 10 | 4076350421 |
| 11 | 13340783196 |
| 12 | 38910617655 |
| 13 | 101766230790 |
| 14 | 239877544005 |
| 15 | 511738760544 |
| 16 | 991493848554 |
| 17 | 1749695026860 |
| 18 | 2818953098830 |
| 19 | 4154246671960 |
| 20 | 5608233007146 |
| 21 | 6943526580276 |
[1,46,1035,15180,163185,1370754,9366819,53524680, 260932815,1101716330,4076350421,13340783196, 38910617655,101766230790,239877544005, 511738760544,991493848554,1749695026860, 2818953098830,4154246671960,5608233007146, 6943526580276] |