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 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 9 |
| 7 | 37 |
| 8 | 121 |
| 9 | 331 |
| 10 | 794 |
| 11 | 1732 |
| 12 | 3553 |
| 13 | 7116 |
| 14 | 14501 |
| 15 | 31078 |
| 16 | 70607 |
| 17 | 166922 |
| 18 | 399315 |
| 19 | 946121 |
| 20 | 2197582 |
| 21 | 4998597 |
| 22 | 11188280 |
| 23 | 24835641 |
| 24 | 55117511 |
| 25 | 123036293 |
| 26 | 276976136 |
| 27 | 628285812 |
| 28 | 1431723937 |
| 29 | 3265884047 |
| 30 | 7436635822 |
| 31 | 16880558594 |
| 32 | 38196652951 |
| 33 | 86238054374 |