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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 1 |
| 7 | -1 |
| 8 | -3 |
| 9 | -5 |
| 10 | -4 |
| 11 | -11 |
| 12 | -13 |
| 13 | -7 |
| 14 | 23 |
| 15 | 86 |
| 16 | 87 |
| 17 | 199 |
| 18 | 415 |
| 19 | 799 |
| 20 | -152 |
| 21 | -4159 |
| 22 | -8063 |
| 23 | -17047 |
| 24 | -38727 |
| 25 | -155366 |
| 26 | -142471 |
| 27 | 445015 |
| 28 | 2309453 |
| 29 | 7627979 |
| 30 | 13609844 |
| 31 | 81138437 |
| 32 | 187790979 |
| 33 | 142104721 |
| 34 | -1743980081 |
| 35 | -12357952274 |
| 36 | -25547499185 |
| 37 | -134098256401 |