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 | 2 |
| 3 | 3 |
| 4 | 9 |
| 5 | 17 |
| 6 | 20 |
| 7 | 21 |
| 8 | 27 |
| 9 | 42 |
| 10 | 65 |
| 11 | 120 |
| 12 | 132 |
| 13 | 177 |
| 14 | 240 |
| 15 | 453 |
| 16 | 552 |
| 17 | 1599 |
| 18 | 2174 |
| 19 | 2977 |
| 20 | 3648 |
| 21 | 7707 |
| 22 | 8315 |
| 23 | 10391 |
| 24 | 12457 |
| 25 | 21056 |
| 26 | 26222 |
| 27 | 48296 |
| 28 | 64040 |
| 29 | 84903 |
| 30 | 92975 |
| 31 | 95071 |