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 | -3 |
| 6 | -8 |
| 7 | -15 |
| 8 | -23 |
| 9 | -26 |
| 10 | -12 |
| 11 | 37 |
| 12 | 144 |
| 13 | 326 |
| 14 | 564 |
| 15 | 753 |
| 16 | 633 |
| 17 | -281 |
| 18 | -2699 |
| 19 | -7346 |
| 20 | -14333 |
| 21 | -21858 |
| 22 | -24097 |
| 23 | -8635 |
| 24 | 45094 |
| 25 | 162928 |
| 26 | 362513 |
| 27 | 620686 |
| 28 | 813906 |
| 29 | 633510 |
| 30 | -495381 |
| 31 | -3408175 |
| 32 | -8939865 |
| 33 | -17141831 |
| 34 | -25663802 |
| 35 | -27145201 |
| 36 | -6079518 |
| 37 | 62953931 |