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) |
|---|---|
| 1 | 1 |
| 2 | -3 |
| 3 | -34 |
| 4 | -96 |
| 5 | -3399 |
| 6 | 30239 |
| 7 | -624046 |
| 8 | -4482626 |
| 9 | -32249230 |
| 10 | 9768165230 |
| 11 | -186975207617 |
| 12 | -2150337557747 |
| 13 | -327482869358214 |
| 14 | 6894274639051756 |
| 15 | 539094536846680025 |
| 16 | 8044964790023844733 |
| 17 | -707278869236116107432 |
| 18 | -12275330572755863672628 |
| 19 | -2190860499375418948848067 |