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 | 2 |
| 2 | 4 |
| 3 | 5 |
| 4 | 13 |
| 5 | 19 |
| 6 | 58 |
| 7 | 191 |
| 8 | 131 |
| 9 | 1187 |
| 10 | 2231 |
| 11 | 17519 |
| 12 | 71063 |
| 13 | 29881 |
| 14 | 323423 |
| 15 | 2887921 |
| 16 | 13237457 |
| 17 | 2397389 |
| 18 | 15030317 |
| 19 | 742458253 |
| 20 | 3748521653 |
| 21 | 9670072483 |
| 22 | 25451905333 |
| 23 | 10932619111 |
| 24 | 78684575461 |
| 25 | 4163946939067 |
| 26 | 11799518538967 |
| 27 | 136025604432743 |
| 28 | 159359728522979 |