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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 59 |
| 7 | 115 |
| 8 | 224 |
| 9 | 436 |
| 10 | 851 |
| 11 | 1657 |
| 12 | 3231 |
| 13 | 6300 |
| 14 | 12287 |
| 15 | 23966 |
| 16 | 46762 |
| 17 | 91250 |
| 18 | 178107 |
| 19 | 347709 |
| 20 | 678959 |
| 21 | 1326050 |
| 22 | 2590430 |
| 23 | 5061449 |
| 24 | 9891729 |
| 25 | 19335866 |
| 26 | 37805063 |
| 27 | 73931821 |
| 28 | 144613480 |
| 29 | 282932141 |
| 30 | 553671863 |
| 31 | 1083726319 |
| 32 | 2121700836 |
| 33 | 4154763584 |