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 | 1 |
| 2 | 5 |
| 3 | 13 |
| 4 | 47 |
| 5 | 271 |
| 6 | 301 |
| 7 | 2287 |
| 8 | 491 |
| 9 | 1045 |
| 10 | 367 |
| 11 | 1919 |
| 12 | 1999 |
| 13 | 22829 |
| 14 | 23599 |
| 15 | 121691 |
| 16 | 1628183 |
| 17 | 15054047 |
| 18 | 15440147 |
| 19 | 15800507 |
| 20 | 32276689 |
| 21 | 32931889 |
| 22 | 570652913 |
| 23 | 83022119 |
| 24 | 84480719 |
| 25 | 1631388461 |
| 26 | 1656970061 |
| 27 | 1681912121 |
| 28 | 11939665247 |
| 29 | 12098387447 |
| 30 | 12253582487 |
| 31 | 285324285601 |