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 | 2 |
| 2 | 5 |
| 3 | 10 |
| 4 | 17 |
| 5 | 40 |
| 6 | 77 |
| 7 | 130 |
| 8 | 203 |
| 9 | 440 |
| 10 | 813 |
| 11 | 1350 |
| 12 | 2087 |
| 13 | 4460 |
| 14 | 8197 |
| 15 | 13570 |
| 16 | 20943 |
| 17 | 44680 |
| 18 | 82053 |
| 19 | 135790 |
| 20 | 209527 |
| 21 | 446900 |
| 22 | 820637 |
| 23 | 1358010 |
| 24 | 2095383 |
| 25 | 4469120 |
| 26 | 8206493 |
| 27 | 13580230 |
| 28 | 20953967 |
| 29 | 44691340 |