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 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 3 |
| 7 | 11 |
| 8 | 13 |
| 9 | 47 |
| 10 | 61 |
| 11 | 235 |
| 12 | 341 |
| 13 | 1301 |
| 14 | 1983 |
| 15 | 7741 |
| 16 | 12650 |
| 17 | 48629 |
| 18 | 82826 |
| 19 | 317955 |
| 20 | 564225 |
| 21 | 2144505 |
| 22 | 3926353 |
| 23 | 14828074 |
| 24 | 27940136 |
| 25 | 104636890 |
| 26 | 201837109 |
| 27 | 751065460 |
| 28 | 1479817181 |
| 29 | 5469566585 |
| 30 | 10975442036 |
| 31 | 40330829030 |
| 32 | 82270184950 |