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 | 19 |
| 2 | 439 |
| 3 | 0 |
| 4 | 262524239 |
| 5 | 765439 |
| 6 | 0 |
| 7 | 109876549 |
| 8 | 1098765439 |
| 9 | 0 |
| 10 | 504948474645444342419 |
| 11 | 27262524232221201918179 |
| 12 | 0 |
| 13 | 2019181716151413121110989 |
| 14 | 64636261605958575655545352519 |
| 15 | 0 |