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 | 4 |
| 2 | 11 |
| 3 | 24 |
| 4 | 41 |
| 5 | 44 |
| 6 | -29 |
| 7 | -336 |
| 8 | -1199 |
| 9 | -3116 |
| 10 | -6469 |
| 11 | -10296 |
| 12 | -8839 |
| 13 | 16124 |
| 14 | 108691 |
| 15 | 354144 |
| 16 | 873121 |
| 17 | 1721764 |
| 18 | 2521451 |
| 19 | 1476984 |
| 20 | -6699319 |
| 21 | -34182196 |
| 22 | -103232189 |
| 23 | -242017776 |
| 24 | -451910159 |
| 25 | -597551756 |
| 26 | -130656229 |
| 27 | 2465133864 |