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 | 235 |
| 4 | 2357 |
| 5 | 35711 |
| 6 | 571113 |
| 7 | 7111317 |
| 8 | 11131719 |
| 9 | 113171923 |
| 10 | 1317192329 |
| 11 | 31719232931 |
| 12 | 171923293137 |
| 13 | 7192329313741 |
| 14 | 19232931374143 |
| 15 | 923293137414347 |
| 16 | 2329313741434753 |
| 17 | 32931374143475359 |
| 18 | 293137414347535961 |
| 19 | 9313741434753596167 |
| 20 | 31374143475359616771 |
| 21 | 137414347535961677173 |
| 22 | 3741434753596167717379 |