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 | -26 |
| 2 | 286 |
| 3 | -1716 |
| 4 | 6006 |
| 5 | -12012 |
| 6 | 12012 |
| 7 | -3432 |
| 8 | -858 |
| 9 | -572 |
| 10 | -572 |
| 11 | -728 |
| 12 | -1092 |
| 13 | -1848 |
| 14 | -3432 |
| 15 | -6864 |
| 16 | -14586 |
| 17 | -32604 |
| 18 | -76076 |
| 19 | -184184 |
| 20 | -460460 |
| 21 | -1184040 |
| 22 | -3121560 |
| 23 | -8414640 |
| 24 | -23140260 |
| 25 | -64792728 |
| 26 | -184410072 |
| 27 | -532740208 |
| 28 | -1560167752 |
| 29 | -4626704368 |
| 30 | -13880113104 |