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 | -9 |
| 3 | -44 |
| 4 | 29 |
| 5 | 630 |
| 6 | 883 |
| 7 | -6424 |
| 8 | -24327 |
| 9 | 34858 |
| 10 | 385967 |
| 11 | 318780 |
| 12 | -4380011 |
| 13 | -12904162 |
| 14 | 31131819 |
| 15 | 230017744 |
| 16 | 55321841 |
| 17 | -2879586990 |
| 18 | -6478357913 |
| 19 | 24477915044 |
| 20 | 133174482957 |
| 21 | -51863929658 |
| 22 | -1834996137757 |
| 23 | -2995761189960 |
| 24 | 17863427410921 |
| 25 | 74671750291322 |