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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 2 |
| 8 | 3 |
| 9 | 5 |
| 10 | 9 |
| 11 | 14 |
| 12 | 28 |
| 13 | 49 |
| 14 | 95 |
| 15 | 182 |
| 16 | 369 |
| 17 | 733 |
| 18 | 1509 |
| 19 | 3103 |
| 20 | 6504 |
| 21 | 13627 |
| 22 | 28949 |
| 23 | 61701 |
| 24 | 132457 |
| 25 | 285454 |
| 26 | 618863 |
| 27 | 1346022 |
| 28 | 2940287 |
| 29 | 6444364 |
| 30 | 14172744 |
| 31 | 31257883 |
| 32 | 69142445 |
| 33 | 153333476 |
| 34 | 340880766 |
| 35 | 759549740 |
| 36 | 1696122213 |
| 37 | 3795178540 |
| 38 | 8508326129 |
| 39 | 19109193805 |
| 40 | 42991993545 |
| 41 | 96881110654 |