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 | 10 |
| 2 | 20 |
| 3 | 20 |
| 4 | 52 |
| 5 | 52 |
| 6 | 52 |
| 7 | 1548 |
| 8 | 5166 |
| 9 | 5166 |
| 10 | 31894 |
| 11 | 137308 |
| 12 | 137308 |
| 13 | 272391 |
| 14 | 569065 |
| 15 | 569065 |
| 16 | 9575722 |
| 17 | 110367538 |
| 18 | 110367538 |
| 19 | 110367538 |
| 20 | 110367538 |
| 21 | 110367538 |
| 22 | 59775617846 |
| 23 | 184563607175 |
| 24 | 184563607175 |