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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 150 |
| 3 | 6252 |
| 4 | 182500 |
| 5 | 4112502 |
| 6 | 75578370 |
| 7 | 1173777752 |
| 8 | 15795816120 |
| 9 | 187652162502 |
| 10 | 1996568642530 |
| 11 | 19245807386652 |
| 12 | 169668375420180 |
| 13 | 1378768046330402 |
| 14 | 10396793993805030 |
| 15 | 73166155146412752 |
| 16 | 482928212647720720 |
| 17 | 3002693915693248002 |
| 18 | 17655197338344400470 |
[2,150,6252,182500,4112502,75578370,1173777752, 15795816120,187652162502,1996568642530, 19245807386652,169668375420180,1378768046330402, 10396793993805030,73166155146412752, 482928212647720720,3002693915693248002, 17655197338344400470] |