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 | 7 |
| 4 | 14 |
| 5 | 27 |
| 6 | 52 |
| 7 | 101 |
| 8 | 196 |
| 9 | 379 |
| 10 | 733 |
| 11 | 1419 |
| 12 | 2744 |
| 13 | 5308 |
| 14 | 10267 |
| 15 | 19860 |
| 16 | 38416 |
| 17 | 74309 |
| 18 | 143740 |
| 19 | 278041 |
| 20 | 537824 |
| 21 | 1040333 |
| 22 | 2012353 |
| 23 | 3892568 |
| 24 | 7529536 |
| 25 | 14564656 |
| 26 | 28172944 |
| 27 | 54495952 |
| 28 | 105413504 |
| 29 | 203905180 |