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 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 4 |
| 6 | 6 |
| 7 | 12 |
| 8 | 23 |
| 9 | 38 |
| 10 | 68 |
| 11 | 129 |
| 12 | 236 |
| 13 | 438 |
| 14 | 806 |
| 15 | 1516 |
| 16 | 2864 |
| 17 | 5388 |
| 18 | 10178 |
| 19 | 19327 |
| 20 | 36839 |
| 21 | 70201 |
| 22 | 134151 |
| 23 | 256884 |
| 24 | 492947 |
| 25 | 947240 |
| 26 | 1822831 |
| 27 | 3513553 |
| 28 | 6781479 |
| 29 | 13103713 |
| 30 | 25349311 |
| 31 | 49091941 |
| 32 | 95168089 |
| 33 | 184662764 |
| 34 | 358633903 |
| 35 | 697097374 |
| 36 | 1356055862 |
| 37 | 2639879029 |
| 38 | 5142830496 |