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 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 35 |
| 5 | 98 |
| 6 | 294 |
| 7 | 832 |
| 8 | 2401 |
| 9 | 6774 |
| 10 | 19137 |
| 11 | 53466 |
| 12 | 148994 |
| 13 | 412233 |
| 14 | 1136383 |
| 15 | 3116654 |
| 16 | 8515706 |
| 17 | 23172455 |
| 18 | 62836916 |
| 19 | 169801824 |
| 20 | 457406173 |
| 21 | 1228382159 |
| 22 | 3289493887 |
| 23 | 8784935160 |
| 24 | 23400668297 |
| 25 | 62179339101 |
| 26 | 164832960183 |
| 27 | 435978612329 |
| 28 | 1150673925933 |
| 29 | 3030701471118 |