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 | 4 |
| 3 | 12 |
| 4 | 28 |
| 5 | 80 |
| 6 | 52 |
| 7 | 203 |
| 8 | 524 |
| 9 | 903 |
| 10 | 2184 |
| 11 | 3960 |
| 12 | 9628 |
| 13 | 20735 |
| 14 | 41619 |
| 15 | 93392 |
| 16 | 194732 |
| 17 | 425901 |
| 18 | 908791 |
| 19 | 1923408 |
| 20 | 4177488 |
| 21 | 8887289 |
| 22 | 19098160 |
| 23 | 40895771 |
| 24 | 87444572 |
| 25 | 187934955 |
| 26 | 401853599 |
| 27 | 861531618 |
| 28 | 1846051011 |
| 29 | 3953574901 |
| 30 | 8476042452 |
| 31 | 18151661911 |
| 32 | 38898045292 |