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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 24 |
| 7 | 46 |
| 8 | 88 |
| 9 | 172 |
| 10 | 337 |
| 11 | 667 |
| 12 | 1321 |
| 13 | 2629 |
| 14 | 5234 |
| 15 | 10444 |
| 16 | 20842 |
| 17 | 41638 |
| 18 | 83188 |
| 19 | 166288 |
| 20 | 332404 |
| 21 | 664636 |
| 22 | 1328935 |
| 23 | 2657533 |
| 24 | 5314399 |
| 25 | 10628131 |
| 26 | 21254941 |
| 27 | 42508561 |
| 28 | 85014493 |
| 29 | 170026357 |
| 30 | 340047480 |
| 31 | 680089726 |
| 32 | 1360169008 |
| 33 | 2720327572 |