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 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 8 |
| 5 | 14 |
| 6 | 28 |
| 7 | 49 |
| 8 | 98 |
| 9 | 177 |
| 10 | 354 |
| 11 | 650 |
| 12 | 1300 |
| 13 | 2417 |
| 14 | 4834 |
| 15 | 9071 |
| 16 | 18142 |
| 17 | 34289 |
| 18 | 68578 |
| 19 | 130360 |
| 20 | 260720 |
| 21 | 497928 |
| 22 | 995856 |
| 23 | 1909322 |
| 24 | 3818644 |
| 25 | 7345470 |
| 26 | 14690940 |
| 27 | 28338826 |
| 28 | 56677652 |
| 29 | 109597727 |
| 30 | 219195454 |
| 31 | 424761659 |
| 32 | 849523318 |