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 | 8 |
| 2 | -818 |
| 3 | -20656 |
| 4 | 1999180 |
| 5 | 88867808 |
| 6 | -8105441336 |
| 7 | -535131970624 |
| 8 | 45761939043472 |
| 9 | 4141986697070720 |
| 10 | -330122378550514976 |
| 11 | -39173301696567870208 |
| 12 | 2889460903124553335488 |
| 13 | 437725912381470764965376 |
| 14 | -29628751416174362424982400 |
| 15 | -5642069577415795905192322048 |