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 | 2 |
| 2 | 23 |
| 3 | 257 |
| 4 | 2357 |
| 5 | 112573 |
| 6 | 11132357 |
| 7 | 1113223537 |
| 8 | 111317193257 |
| 9 | 11131719223357 |
| 10 | 1113171922335437 |
| 11 | 111317192232934157 |
| 12 | 11131719223293135773 |
| 13 | 1113171922329313375759 |
| 14 | 111317192232931337415743 |
| 15 | 11131719223293133741435717 |