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 | 3 |
| 3 | 4 |
| 4 | 4 |
| 5 | 5 |
| 6 | 5 |
| 7 | 5 |
| 8 | 6 |
| 9 | 47 |
| 10 | 109 |
| 11 | 935 |
| 12 | 4763 |
| 13 | 7821 |
| 14 | 8895 |
| 15 | 9889 |
| 16 | 35798 |
| 17 | 44347 |
| 18 | 1146551 |
| 19 | 7874944 |
| 20 | 8043393 |
| 21 | 27403243 |
| 22 | 34058912 |
| 23 | 58098040 |
| 24 | 68760470 |
| 25 | 80046897 |
| 26 | 560099631 |
| 27 | 611427977 |
| 28 | 14235032003 |
| 29 | 602865059026 |
| 30 | 813485869378 |