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 | 5 |
| 4 | 5 |
| 5 | 13 |
| 6 | 20 |
| 7 | 32 |
| 8 | -2 |
| 9 | 107 |
| 10 | 149 |
| 11 | 129 |
| 12 | -108 |
| 13 | -262 |
| 14 | 606 |
| 15 | 4273 |
| 16 | -1001 |
| 17 | -1150 |
| 18 | -8147 |
| 19 | -25864 |
| 20 | 1793 |
| 21 | 131821 |
| 22 | 236852 |
| 23 | 170299 |
| 24 | -1457515 |
| 25 | -1298382 |
| 26 | -696074 |
| 27 | 4852276 |
| 28 | 13381975 |
| 29 | 9282183 |
| 30 | -31755860 |
| 31 | -38912939 |
| 32 | -155537309 |
| 33 | 238551912 |
| 34 | 420017788 |
| 35 | 224666693 |
| 36 | -1955768303 |