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 | 0 |
| 2 | -1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 7 |
| 7 | 14 |
| 8 | 27 |
| 9 | 57 |
| 10 | 114 |
| 11 | 229 |
| 12 | 455 |
| 13 | 910 |
| 14 | 1819 |
| 15 | 3641 |
| 16 | 7282 |
| 17 | 14565 |
| 18 | 29127 |
| 19 | 58254 |
| 20 | 116507 |
| 21 | 233017 |
| 22 | 466034 |
| 23 | 932069 |
| 24 | 1864135 |
| 25 | 3728270 |
| 26 | 7456539 |
| 27 | 14913081 |
| 28 | 29826162 |
| 29 | 59652325 |
| 30 | 119304647 |
| 31 | 238609294 |
| 32 | 477218587 |
| 33 | 954437177 |
| 34 | 1908874354 |
| 35 | 3817748709 |
| 36 | 7635497415 |