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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 6 |
| 7 | 11 |
| 8 | 22 |
| 9 | 44 |
| 10 | 86 |
| 11 | 172 |
| 12 | 344 |
| 13 | 684 |
| 14 | 1368 |
| 15 | 2736 |
| 16 | 5464 |
| 17 | 10928 |
| 18 | 21856 |
| 19 | 43696 |
| 20 | 87392 |
| 21 | 174784 |
| 22 | 349536 |
| 23 | 699072 |
| 24 | 1398144 |
| 25 | 2796224 |
| 26 | 5592448 |
| 27 | 11184896 |
| 28 | 22369664 |
| 29 | 44739328 |
| 30 | 89478656 |
| 31 | 178957056 |
| 32 | 357914112 |
| 33 | 715828224 |
| 34 | 1431655936 |