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 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 4 |
| 5 | 4 |
| 6 | 11 |
| 7 | 15 |
| 8 | 43 |
| 9 | 77 |
| 10 | 199 |
| 11 | 423 |
| 12 | 1080 |
| 13 | 2514 |
| 14 | 6355 |
| 15 | 15529 |
| 16 | 39429 |
| 17 | 98875 |
| 18 | 252551 |
| 19 | 643133 |
| 20 | 1653677 |
| 21 | 4254070 |
| 22 | 11005241 |
| 23 | 28518931 |
| 24 | 74179434 |
| 25 | 193328017 |
| 26 | 505236093 |
| 27 | 1322919905 |
| 28 | 3471492272 |
| 29 | 9125743338 |