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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 29 |
| 4 | 95 |
| 5 | 307 |
| 6 | 976 |
| 7 | 3073 |
| 8 | 9645 |
| 9 | 30283 |
| 10 | 95207 |
| 11 | 299625 |
| 12 | 943363 |
| 13 | 2970320 |
| 14 | 9351621 |
| 15 | 29439359 |
| 16 | 92671625 |
| 17 | 291715157 |
| 18 | 918275995 |
| 19 | 2890621063 |
| 20 | 9099375792 |
| 21 | 28643956245 |
| 22 | 90168412937 |
| 23 | 283841284899 |
| 24 | 893503898503 |
| 25 | 2812659866565 |
| 26 | 8853968158791 |
| 27 | 27871395427616 |