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 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 96 |
| 7 | 192 |
| 8 | 384 |
| 9 | 738 |
| 10 | 1446 |
| 11 | 2832 |
| 12 | 5544 |
| 13 | 10818 |
| 14 | 21138 |
| 15 | 40980 |
| 16 | 79848 |
| 17 | 155406 |
| 18 | 302526 |
| 19 | 587232 |
| 20 | 1141620 |
| 21 | 2214102 |
| 22 | 4300410 |
| 23 | 8340876 |
| 24 | 16188108 |
| 25 | 31368204 |
| 26 | 60840540 |
| 27 | 117858042 |
| 28 | 228471396 |
| 29 | 442435860 |
| 30 | 857273136 |
| 31 | 1659450072 |
| 32 | 3214094028 |
| 33 | 6220079160 |