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 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 7 |
| 7 | 15 |
| 8 | 28 |
| 9 | 57 |
| 10 | 113 |
| 11 | 228 |
| 12 | 455 |
| 13 | 911 |
| 14 | 1820 |
| 15 | 3641 |
| 16 | 7281 |
| 17 | 14564 |
| 18 | 29127 |
| 19 | 58255 |
| 20 | 116508 |
| 21 | 233017 |
| 22 | 466033 |
| 23 | 932068 |
| 24 | 1864135 |
| 25 | 3728271 |
| 26 | 7456540 |
| 27 | 14913081 |
| 28 | 29826161 |
| 29 | 59652324 |
| 30 | 119304647 |
| 31 | 238609295 |
| 32 | 477218588 |
| 33 | 954437177 |
| 34 | 1908874353 |