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) |
|---|---|
| 15 | 4 |
| 16 | 0 |
| 17 | 26 |
| 18 | 0 |
| 19 | 194 |
| 20 | 17 |
| 21 | 1086 |
| 22 | 152 |
| 23 | 6140 |
| 24 | 1006 |
| 25 | 32713 |
| 26 | 6335 |
| 27 | 172379 |
| 28 | 38800 |