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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | -2 |
| 4 | 3 |
| 5 | -11 |
| 6 | 1 |
| 7 | -87 |
| 8 | -167 |
| 9 | -306 |
| 10 | -500 |
| 11 | -552 |
| 12 | 688 |
| 13 | -3041 |
| 14 | -579 |
| 15 | 20854 |
| 16 | 37075 |
| 17 | 55618 |
| 18 | 37108 |
| 19 | -222296 |
| 20 | -147729 |
| 21 | 891994 |
| 22 | 602155 |
| 23 | -3523022 |
| 24 | -2228805 |
| 25 | 14811346 |
| 26 | 11792251 |
| 27 | -47737262 |
| 28 | -1136517 |
| 29 | 375078994 |
| 30 | 741065851 |
| 31 | 1445763154 |
| 32 | 2746052116 |
| 33 | 4910207464 |
| 34 | 7492827856 |