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) |
|---|---|
| 3 | 7 |
| 4 | 53 |
| 5 | 3121 |
| 6 | 211 |
| 7 | 1999 |
| 8 | 3803 |
| 9 | 6469 |
| 10 | 991 |
| 11 | 161047 |
| 12 | 19793 |
| 13 | 16477 |
| 14 | 24907 |
| 15 | 683437 |
| 16 | 3547 |
| 17 | 67853 |
| 18 | 80273 |
| 19 | 94109 |
| 20 | 72421 |