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 | 2 |
| 2 | 3 |
| 3 | 2 |
| 4 | -5 |
| 5 | -22 |
| 6 | -50 |
| 7 | -74 |
| 8 | -47 |
| 9 | 122 |
| 10 | 544 |
| 11 | 1230 |
| 12 | 1816 |
| 13 | 1144 |
| 14 | -3029 |
| 15 | -13416 |
| 16 | -30267 |
| 17 | -44578 |
| 18 | -27815 |
| 19 | 75170 |
| 20 | 330874 |
| 21 | 744780 |
| 22 | 1094243 |
| 23 | 676196 |
| 24 | -1865344 |
| 25 | -8160100 |
| 26 | -18326608 |
| 27 | -26859600 |
| 28 | -16435947 |
| 29 | 46284926 |
| 30 | 201243559 |
| 31 | 450953386 |
| 32 | 659291863 |
| 33 | 399432970 |
| 34 | -1148383866 |