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 | 7 |
| 2 | 17 |
| 3 | 317 |
| 4 | 6317 |
| 5 | 26317 |
| 6 | 2126317 |
| 7 | 102126317 |
| 8 | 9102126317 |
| 9 | 89102126317 |
| 10 | 3789102126317 |
| 11 | 203789102126317 |
| 12 | 25203789102126317 |
| 13 | 2925203789102126317 |
| 14 | 722925203789102126317 |
| 15 | 28722925203789102126317 |