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) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 2 |
| 5 | 5 |
| 6 | 7 |
| 7 | 13 |
| 8 | 23 |
| 9 | 43 |
| 10 | 75 |
| 11 | 137 |
| 12 | 255 |
| 13 | 464 |
| 14 | 872 |
| 15 | 1612 |
| 16 | 3030 |
| 17 | 5709 |
| 18 | 10749 |
| 19 | 20390 |
| 20 | 38635 |
| 21 | 73586 |
| 22 | 140336 |
| 23 | 268216 |
| 24 | 513708 |
| 25 | 985818 |
| 26 | 1894120 |
| 27 | 3645744 |
| 28 | 7027290 |
| 29 | 13561907 |
| 30 | 26207278 |
| 31 | 50697537 |
| 32 | 98182656 |
| 33 | 190335585 |
| 34 | 369323305 |
| 35 | 717267168 |
| 36 | 1394192236 |
| 37 | 2712103833 |
| 38 | 5279763824 |