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 | 14 |
| 2 | 196 |
| 3 | 826 |
| 4 | 3641 |
| 5 | 18972 |
| 6 | 82477 |
| 7 | 335915 |
| 8 | 1424240 |
| 9 | 5887228 |
| 10 | 23664574 |
| 11 | 95673277 |
| 12 | 385982750 |
| 13 | 1544370231 |
| 14 | 6178516519 |
| 15 | 24726844456 |
| 16 | 98762900758 |
| 17 | 394298390750 |
| 18 | 1574547834937 |
| 19 | 6285202997898 |
| 20 | 25083924670973 |
| 21 | 100115382776031 |