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 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 15 |
| 6 | 32 |
| 7 | 69 |
| 8 | 148 |
| 9 | 318 |
| 10 | 683 |
| 11 | 1467 |
| 12 | 3151 |
| 13 | 6768 |
| 14 | 14537 |
| 15 | 31224 |
| 16 | 67066 |
| 17 | 144051 |
| 18 | 309407 |
| 19 | 664575 |
| 20 | 1427440 |
| 21 | 3065997 |
| 22 | 6585452 |
| 23 | 14144886 |
| 24 | 30381787 |
| 25 | 65257011 |
| 26 | 140165471 |
| 27 | 301061280 |
| 28 | 646649233 |
| 29 | 1388937264 |
| 30 | 2983297010 |
| 31 | 6407820771 |
| 32 | 13763352055 |
| 33 | 29562290607 |