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 | 1 |
| 5 | -1 |
| 6 | -4 |
| 7 | -8 |
| 8 | -13 |
| 9 | -16 |
| 10 | -3 |
| 11 | 39 |
| 12 | 126 |
| 13 | 273 |
| 14 | 411 |
| 15 | 283 |
| 16 | -619 |
| 17 | -3149 |
| 18 | -8201 |
| 19 | -14496 |
| 20 | -14368 |
| 21 | 12984 |
| 22 | 109920 |
| 23 | 329552 |
| 24 | 655436 |
| 25 | 785583 |
| 26 | -312525 |
| 27 | -5009034 |
| 28 | -16789151 |
| 29 | -36433571 |
| 30 | -48990090 |
| 31 | 6965306 |
| 32 | 286109557 |
| 33 | 1044072824 |
| 34 | 2414264953 |
| 35 | 3490255449 |
| 36 | -41486331 |