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 | 1 |
| 3 | 4 |
| 4 | 5 |
| 5 | 20 |
| 6 | 30 |
| 7 | 48 |
| 8 | 74 |
| 9 | 265 |
| 10 | 818 |
| 11 | 897 |
| 12 | 2027 |
| 13 | 5107 |
| 14 | 6846 |
| 15 | 13049 |
| 16 | 236586 |
| 17 | 364437 |
| 18 | 643493 |
| 19 | 1144424 |
| 20 | 7294777 |
| 21 | 49484843 |
| 22 | 51161394 |
| 23 | 76008087 |
| 24 | 202870914 |
| 25 | 391981014 |
| 26 | 11731070977 |
| 27 | 79069971960 |
| 28 | 415100034571 |
| 29 | 1212266245583 |