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 | -2 |
| 5 | -2 |
| 6 | 0 |
| 7 | 5 |
| 8 | 12 |
| 9 | 16 |
| 10 | 6 |
| 11 | -32 |
| 12 | -102 |
| 13 | -170 |
| 14 | -130 |
| 15 | 199 |
| 16 | 966 |
| 17 | 1978 |
| 18 | 2192 |
| 19 | -650 |
| 20 | -9292 |
| 21 | -23624 |
| 22 | -33760 |
| 23 | -12138 |
| 24 | 84440 |
| 25 | 280852 |
| 26 | 493932 |
| 27 | 397668 |
| 28 | -639676 |
| 29 | -3248464 |
| 30 | -6947460 |
| 31 | -8068587 |
| 32 | 2165980 |
| 33 | 35591960 |
| 34 | 94129446 |
| 35 | 139864828 |
| 36 | 56393482 |
| 37 | -352505722 |