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 | 5 |
| 5 | 8 |
| 6 | 21 |
| 7 | 44 |
| 8 | 94 |
| 9 | 197 |
| 10 | 416 |
| 11 | 857 |
| 12 | 1766 |
| 13 | 3621 |
| 14 | 7392 |
| 15 | 15032 |
| 16 | 30493 |
| 17 | 61708 |
| 18 | 124646 |
| 19 | 251359 |
| 20 | 506203 |
| 21 | 1018279 |
| 22 | 2046454 |
| 23 | 4109534 |
| 24 | 8246985 |
| 25 | 16540791 |
| 26 | 33160051 |
| 27 | 66451484 |
| 28 | 133122753 |
| 29 | 266612828 |
| 30 | 533839069 |
| 31 | 1068701695 |
| 32 | 2139110054 |
| 33 | 4281063708 |
| 34 | 8566862025 |