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 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 2 |
| 11 | 1 |
| 12 | 3 |
| 13 | 1 |
| 14 | 10 |
| 15 | 1 |
| 16 | 50 |
| 17 | 1 |
| 18 | 456 |
| 19 | 2 |
| 20 | 5786 |
| 21 | 9 |
| 22 | 91070 |
| 23 | 3918 |
| 24 | 1744339 |
| 25 | 4131992 |
| 26 | 163639193 |
| 27 | 4018022150 |
| 28 | 119026595851 |