This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 18 |
| 3 | 198 |
| 4 | 27 |
| 5 | 54 |
| 6 | 2997 |
| 7 | 36 |
| 8 | 396 |
| 9 | 108 |
| 10 | 39996 |
| 11 | 45 |
| 12 | 90 |
| 13 | 135 |
| 14 | 180 |
| 15 | 499995 |
| 16 | 54 |
| 17 | 594 |
| 18 | 5994 |
| 19 | 3564 |
| 20 | 270 |
| 21 | 5999994 |
| 22 | 63 |
| 23 | 126 |
| 24 | 189 |
| 25 | 252 |
| 26 | 315 |