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 | 2 |
| 3 | 6 |
| 4 | 12 |
| 5 | 27 |
| 6 | 65 |
| 7 | 150 |
| 8 | 353 |
| 9 | 843 |
| 10 | 2014 |
| 11 | 4843 |
| 12 | 11713 |
| 13 | 28433 |
| 14 | 69292 |
| 15 | 169470 |
| 16 | 415754 |
| 17 | 1022868 |
| 18 | 2523120 |
| 19 | 6238645 |
| 20 | 15459561 |
| 21 | 38387191 |
| 22 | 95497612 |
| 23 | 237989801 |
| 24 | 594062697 |
| 25 | 1485141397 |
| 26 | 3718116380 |
| 27 | 9320941698 |
| 28 | 23396109986 |
| 29 | 58795356627 |
| 30 | 147920737819 |