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 | -29 |
| 2 | 377 |
| 3 | -2842 |
| 4 | 13195 |
| 5 | -34684 |
| 6 | 19285 |
| 7 | 206973 |
| 8 | -745706 |
| 9 | 782275 |
| 10 | 1621564 |
| 11 | -5803161 |
| 12 | 4026360 |
| 13 | 8149841 |
| 14 | -12056025 |
| 15 | -7428263 |
| 16 | 254504 |
| 17 | 69194580 |
| 18 | -49156653 |
| 19 | -167517050 |
| 20 | 224634319 |
| 21 | 94868280 |
| 22 | -112333182 |
| 23 | -288914501 |
| 24 | -172722550 |
| 25 | 1061590530 |
| 26 | -420678727 |
| 27 | -212254364 |