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 | -33 |
| 2 | -153 |
| 3 | -713 |
| 4 | -2550 |
| 5 | -7479 |
| 6 | -20314 |
| 7 | -51951 |
| 8 | -122229 |
| 9 | -276656 |
| 10 | -601068 |
| 11 | -1254105 |
| 12 | -2541531 |
| 13 | -5018721 |
| 14 | -9647991 |
| 15 | -18168984 |
| 16 | -33554784 |
| 17 | -60818040 |
| 18 | -108471674 |
| 19 | -190607871 |
| 20 | -330140403 |
| 21 | -564580142 |
| 22 | -953980392 |
| 23 | -1593599832 |
| 24 | -2634301308 |
| 25 | -4311874755 |
| 26 | -6991318008 |