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 | 3 |
| 2 | 3 |
| 3 | 5 |
| 4 | 12 |
| 5 | 30 |
| 6 | 58 |
| 7 | 128 |
| 8 | 237 |
| 9 | 476 |
| 10 | 975 |
| 11 | 1956 |
| 12 | 3899 |
| 13 | 7798 |
| 14 | 15534 |
| 15 | 31270 |
| 16 | 62262 |
| 17 | 124635 |
| 18 | 248944 |
| 19 | 497797 |
| 20 | 995730 |
| 21 | 1990576 |
| 22 | 3983767 |
| 23 | 7969049 |
| 24 | 15935289 |
| 25 | 31870309 |
| 26 | 63739461 |
| 27 | 127519282 |
| 28 | 254994762 |
| 29 | 510016513 |
| 30 | 1020092276 |
| 31 | 2040066241 |
| 32 | 4080236749 |