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 | 3 |
| 2 | 7 |
| 3 | 151 |
| 4 | 727 |
| 5 | 787 |
| 6 | 10501 |
| 7 | 13831 |
| 8 | 18181 |
| 9 | 30103 |
| 10 | 70207 |
| 11 | 72727 |
| 12 | 77377 |
| 13 | 78487 |
| 14 | 93139 |
| 15 | 94849 |
| 16 | 96469 |
| 17 | 96769 |
| 18 | 98689 |
| 19 | 1008001 |
| 20 | 1062601 |
| 21 | 1160611 |
| 22 | 1190911 |
| 23 | 1253521 |
| 24 | 1327231 |
| 25 | 1409041 |
| 26 | 1447441 |
| 27 | 1463641 |
| 28 | 1490941 |
| 29 | 1640461 |
| 30 | 1670761 |
| 31 | 1684861 |