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 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 17 |
| 7 | 37 |
| 8 | 83 |
| 9 | 189 |
| 10 | 436 |
| 11 | 1014 |
| 12 | 2373 |
| 13 | 5578 |
| 14 | 13156 |
| 15 | 31104 |
| 16 | 73665 |
| 17 | 174665 |
| 18 | 414427 |
| 19 | 983606 |
| 20 | 2334488 |