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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 0 |
| 7 | 2 |
| 8 | -1 |
| 9 | 0 |
| 10 | 10 |
| 11 | -14 |
| 12 | 13 |
| 13 | 30 |
| 14 | -85 |
| 15 | 124 |
| 16 | 50 |
| 17 | -476 |
| 18 | 1047 |
| 19 | -642 |
| 20 | -1949 |
| 21 | 7220 |
| 22 | -9547 |
| 23 | -2690 |
| 24 | 42625 |
| 25 | -90224 |
| 26 | 62414 |
| 27 | 190074 |
| 28 | -683506 |
| 29 | 952260 |
| 30 | 290296 |
| 31 | -4276192 |
| 32 | 9356547 |
| 33 | -6406858 |
| 34 | -20006212 |
| 35 | 73731040 |
| 36 | -103077077 |