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 | 11 |
| 3 | 181 |
| 4 | 373 |
| 5 | 12821 |
| 6 | 14741 |
| 7 | 32323 |
| 8 | 72227 |
| 9 | 74747 |
| 10 | 77977 |
| 11 | 78887 |
| 12 | 79997 |
| 13 | 90709 |
| 14 | 94049 |
| 15 | 94849 |
| 16 | 98689 |
| 17 | 1055501 |
| 18 | 1065601 |
| 19 | 1114111 |
| 20 | 1129211 |
| 21 | 1134311 |
| 22 | 1177711 |
| 23 | 1180811 |
| 24 | 1186811 |
| 25 | 1190911 |
| 26 | 1262621 |
| 27 | 1333331 |
| 28 | 1338331 |
| 29 | 1407041 |
| 30 | 1409041 |
| 31 | 1411141 |
| 32 | 1461641 |
| 33 | 1463641 |