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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 11 |
| 6 | 24 |
| 7 | 57 |
| 8 | 141 |
| 9 | 349 |
| 10 | 871 |
| 11 | 2212 |
| 12 | 5688 |
| 13 | 14730 |
| 14 | 38403 |
| 15 | 100829 |
| 16 | 266333 |
| 17 | 706997 |
| 18 | 1885165 |
| 19 | 5047522 |
| 20 | 13565203 |
| 21 | 36578497 |
| 22 | 98934826 |
| 23 | 268342933 |
| 24 | 729709432 |
| 25 | 1989021256 |
| 26 | 5433518806 |
| 27 | 14873285506 |
| 28 | 40790118487 |
| 29 | 112064912455 |
| 30 | 308390452661 |
| 31 | 849969894794 |
| 32 | 2346045295997 |