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 | -3 |
| 2 | -91 |
| 3 | 873 |
| 4 | 44681 |
| 5 | -723243 |
| 6 | -54370771 |
| 7 | 1234258113 |
| 8 | 123409465361 |
| 9 | -3602675046483 |
| 10 | -450147484965451 |
| 11 | 16061724748579353 |
| 12 | 2408182490139558041 |
| 13 | -101549689784375097723 |
| 14 | -17763194493523591880131 |
| 15 | 864287669702052258292593 |
| 16 | 172779639453348550866418721 |