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 | 1 |
| 4 | 0 |
| 5 | -5 |
| 6 | -14 |
| 7 | -27 |
| 8 | -43 |
| 9 | -50 |
| 10 | -20 |
| 11 | 91 |
| 12 | 342 |
| 13 | 784 |
| 14 | 1380 |
| 15 | 1861 |
| 16 | 1519 |
| 17 | -1025 |
| 18 | -7877 |
| 19 | -21302 |
| 20 | -41829 |
| 21 | -64128 |
| 22 | -70003 |
| 23 | -19381 |
| 24 | 155984 |
| 25 | 544288 |
| 26 | 1208731 |
| 27 | 2073244 |
| 28 | 2706380 |
| 29 | 2003100 |
| 30 | -2136215 |
| 31 | -12820099 |
| 32 | -33219215 |
| 33 | -63581579 |
| 34 | -94886444 |
| 35 | -98351925 |
| 36 | -12445158 |