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 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 7 |
| 6 | 18 |
| 7 | 37 |
| 8 | 76 |
| 9 | 149 |
| 10 | 293 |
| 11 | 575 |
| 12 | 1106 |
| 13 | 2162 |
| 14 | 4161 |
| 15 | 8068 |
| 16 | 15604 |
| 17 | 30181 |
| 18 | 58449 |
| 19 | 113179 |
| 20 | 219587 |
| 21 | 425951 |
| 22 | 827393 |
| 23 | 1608250 |
| 24 | 3128647 |
| 25 | 6090677 |
| 26 | 11867571 |
| 27 | 23139485 |
| 28 | 45148817 |
| 29 | 88155104 |
| 30 | 172231561 |
| 31 | 336713062 |
| 32 | 658655523 |
| 33 | 1289140675 |
| 34 | 2524520079 |
| 35 | 4946303842 |