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 | 93 |
| 7 | 180 |
| 8 | 351 |
| 9 | 684 |
| 10 | 1332 |
| 11 | 2592 |
| 12 | 5046 |
| 13 | 9825 |
| 14 | 19128 |
| 15 | 37239 |
| 16 | 72498 |
| 17 | 141144 |
| 18 | 274788 |
| 19 | 534972 |
| 20 | 1041513 |
| 21 | 2027676 |
| 22 | 3947595 |
| 23 | 7685400 |
| 24 | 14962368 |
| 25 | 29129580 |
| 26 | 56711106 |
| 27 | 110408373 |
| 28 | 214949232 |
| 29 | 418475259 |
| 30 | 814711182 |
| 31 | 1586125572 |
| 32 | 3087958512 |