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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 9 |
| 5 | 19 |
| 6 | 37 |
| 7 | 74 |
| 8 | 149 |
| 9 | 297 |
| 10 | 594 |
| 11 | 1189 |
| 12 | 2377 |
| 13 | 4755 |
| 14 | 9509 |
| 15 | 19018 |
| 16 | 38037 |
| 17 | 76073 |
| 18 | 152147 |
| 19 | 304293 |
| 20 | 608586 |
| 21 | 1217173 |
| 22 | 2434345 |
| 23 | 4868690 |
| 24 | 9737381 |
| 25 | 19474761 |
| 26 | 38949523 |
| 27 | 77899045 |
| 28 | 155798090 |
| 29 | 311596181 |
| 30 | 623192361 |
| 31 | 1246384722 |
| 32 | 2492769445 |
| 33 | 4985538889 |
| 34 | 9971077779 |
| 35 | 19942155557 |
| 36 | 39884311114 |
| 37 | 79768622229 |