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 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 19 |
| 7 | 41 |
| 8 | 84 |
| 9 | 163 |
| 10 | 311 |
| 11 | 615 |
| 12 | 1268 |
| 13 | 2612 |
| 14 | 5228 |
| 15 | 10244 |
| 16 | 20172 |
| 17 | 40496 |
| 18 | 82066 |
| 19 | 165284 |
| 20 | 329388 |
| 21 | 654207 |
| 22 | 1305709 |
| 23 | 2620890 |
| 24 | 5262399 |
| 25 | 10524162 |
| 26 | 20983533 |
| 27 | 41878200 |
| 28 | 83848212 |
| 29 | 168188942 |
| 30 | 337036806 |
| 31 | 673896773 |
| 32 | 1345770393 |
| 33 | 2688442850 |
| 34 | 5375471835 |