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 | -19 |
| 2 | -42 |
| 3 | 11647 |
| 4 | 23982 |
| 5 | -6194779 |
| 6 | -38133522 |
| 7 | 55733008199 |
| 8 | 114327763662 |
| 9 | -53764922346349 |
| 10 | -551437385813202 |
| 11 | 633976248876074077 |
| 12 | 3901396856082694542 |
| 13 | -2650470665560547274919 |
| 14 | -38058072327453466328082 |
| 15 | 238664680344984987892563943 |
| 16 | 489568969024047882430124622 |