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 | 7427466391 |
| 2 | 7413596629 |
| 3 | 6059563073 |
| 4 | 3490763233 |
| 5 | 2988075319 |
| 6 | 1573834187 |
| 7 | 7021540891 |
| 8 | 5408914993 |
| 9 | 6480016847 |
| 10 | 9920695517 |
| 11 | 1838606261 |
| 12 | 6062613313 |
| 13 | 3845830007 |
| 14 | 1692836819 |
| 15 | 4425056953 |
| 16 | 2505695369 |
| 17 | 5490598793 |
| 18 | 1782154249 |
| 19 | 8215424999 |
| 20 | 9229576351 |
| 21 | 9519366803 |