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 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 16 |
| 5 | 34 |
| 6 | 90 |
| 7 | 211 |
| 8 | 515 |
| 9 | 1229 |
| 10 | 2960 |
| 11 | 6893 |
| 12 | 15753 |
| 13 | 34450 |
| 14 | 72235 |
| 15 | 143477 |
| 16 | 269186 |
| 17 | 473945 |
| 18 | 781713 |
| 19 | 1203617 |
| 20 | 1728192 |
| 21 | 2310376 |
| 22 | 2874232 |
| 23 | 3325215 |
| 24 | 3576980 |
| 25 | 3576980 |
| 26 | 3325215 |
| 27 | 2874232 |
| 28 | 2310376 |
| 29 | 1728192 |
| 30 | 1203617 |
| 31 | 781713 |
| 32 | 473945 |
| 33 | 269186 |