| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 132 |
| 3 | 1404 |
| 4 | 14700 |
| 5 | 152532 |
| 6 | 1573716 |
| 7 | 16172148 |
| 8 | 165697044 |
| 9 | 1693773924 |
| 10 | 17281929564 |
| 11 | 176064704412 |
| 12 | 1791455071068 |
| 13 | 18208650297396 |
| 14 | 184907370618612 |
| 15 | 1876240018679868 |
| 16 | 19024942249966812 |
| 17 | 192794447005403916 |
| 18 | 1952681556794601732 |
| 19 | 19767824914170222996 |
[1,12,132,1404,14700,152532,1573716,16172148, 165697044,1693773924,17281929564,176064704412, 1791455071068,18208650297396,184907370618612, 1876240018679868,19024942249966812, 192794447005403916,1952681556794601732, 19767824914170222996] |