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 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 131 |
| 6 | 313 |
| 7 | 373 |
| 8 | 797 |
| 9 | 11311 |
| 10 | 17971 |
| 11 | 18181 |
| 12 | 19991 |
| 13 | 35353 |
| 14 | 72727 |
| 15 | 78787 |
| 16 | 90709 |
| 17 | 93739 |
| 18 | 96769 |
| 19 | 98389 |
| 20 | 1153511 |
| 21 | 1193911 |
| 22 | 1201021 |
| 23 | 1409041 |
| 24 | 1583851 |
| 25 | 1597951 |
| 26 | 1657561 |
| 27 | 1831381 |
| 28 | 1879781 |
| 29 | 3083803 |
| 30 | 3089803 |
| 31 | 3319133 |
| 32 | 3343433 |
| 33 | 3391933 |
| 34 | 3541453 |
| 35 | 3643463 |