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 | 23 |
| 4 | 567 |
| 5 | 6814 |
| 6 | 47358 |
| 7 | 239511 |
| 8 | 954226 |
| 9 | 3207212 |
| 10 | 9414828 |
| 11 | 24862239 |
| 12 | 60136329 |
| 13 | 135311658 |
| 14 | 286229762 |
| 15 | 574460495 |
| 16 | 1101240084 |
| 17 | 2028333848 |
| 18 | 3605765688 |
| 19 | 6211552455 |
| 20 | 10402472811 |
| 21 | 16984387958 |
| 22 | 27099325638 |
| 23 | 42342870823 |
| 24 | 64905898662 |
| 25 | 97761436356 |
| 26 | 144885584740 |
| 27 | 211543443215 |