| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 41 |
| 3 | 1315 |
| 4 | 63825 |
| 5 | 4116611 |
| 6 | 331127353 |
| 7 | 31915763811 |
| 8 | 3585520583585 |
| 9 | 460054836028675 |
| 10 | 66377105303195721 |
| 11 | 10637410917472061603 |
| 12 | 1874707445757653437681 |
| 13 | 360356280811211873453955 |
| 14 | 75028021167256736753934425 |
[1,3,41,1315,63825,4116611,331127353,31915763811, 3585520583585,460054836028675,66377105303195721, 10637410917472061603,1874707445757653437681, 360356280811211873453955, 75028021167256736753934425] |