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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 3 |
| 7 | 12 |
| 8 | 10 |
| 9 | 34 |
| 10 | 28 |
| 11 | 97 |
| 12 | 81 |
| 13 | 271 |
| 14 | 226 |
| 15 | 764 |
| 16 | 638 |
| 17 | 2141 |
| 18 | 1787 |
| 19 | 6025 |
| 20 | 5030 |
| 21 | 16924 |
| 22 | 14116 |
| 23 | 47623 |
| 24 | 39727 |
| 25 | 133934 |
| 26 | 111655 |
| 27 | 377003 |
| 28 | 314297 |
| 29 | 1061064 |
| 30 | 884199 |