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 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 4 |
| 6 | 12 |
| 7 | 23 |
| 8 | 66 |
| 9 | 133 |
| 10 | 316 |
| 11 | 514 |
| 12 | 1987 |
| 13 | 2398 |
| 14 | 6073 |
| 15 | 12628 |
| 16 | 29918 |
| 17 | 26211 |
| 18 | 108778 |
| 19 | 95348 |
| 20 | 375045 |
| 21 | 498168 |
| 22 | 780434 |
| 23 | 843319 |
| 24 | 4981628 |
| 25 | 3691212 |
| 26 | 7357764 |
| 27 | 13169722 |
| 28 | 33461765 |
| 29 | 22372303 |
| 30 | 117437124 |