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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 666666 |
| 3 | 1377789 |
| 4 | 1377798 |
| 5 | 1377879 |
| 6 | 1377897 |
| 7 | 1377978 |
| 8 | 1377987 |
| 9 | 1378779 |
| 10 | 1378797 |
| 11 | 1378977 |
| 12 | 1379778 |
| 13 | 1379787 |
| 14 | 1379877 |
| 15 | 1387779 |
| 16 | 1387797 |
| 17 | 1387977 |
| 18 | 1389777 |
| 19 | 1397778 |
| 20 | 1397787 |
| 21 | 1397877 |
| 22 | 1398777 |
| 23 | 1555888 |
| 24 | 1558588 |
| 25 | 1558858 |