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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 11 |
| 6 | 19 |
| 7 | 41 |
| 8 | 77 |
| 9 | 159 |
| 10 | 307 |
| 11 | 625 |
| 12 | 1231 |
| 13 | 2481 |
| 14 | 4921 |
| 15 | 9883 |
| 16 | 19689 |
| 17 | 39455 |
| 18 | 78751 |
| 19 | 157661 |
| 20 | 315015 |
| 21 | 630337 |
| 22 | 1260049 |
| 23 | 2520723 |
| 24 | 5040215 |
| 25 | 10081661 |
| 26 | 20160841 |
| 27 | 40324163 |
| 28 | 80643405 |
| 29 | 161291731 |
| 30 | 322573579 |
| 31 | 645157041 |
| 32 | 1290294393 |
| 33 | 2580608475 |
| 34 | 5161177495 |