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 | 12 |
| 2 | -194 |
| 3 | -10440 |
| 4 | 71436 |
| 5 | 14972112 |
| 6 | 58938504 |
| 7 | -29656181088 |
| 8 | -495322673520 |
| 9 | 74246441579712 |
| 10 | 2397728871804384 |
| 11 | -222180226077773952 |
| 12 | -11580918658301987136 |
| 13 | 762191973071827303680 |
| 14 | 60032860261440859119744 |
| 15 | -2886298093438596491576832 |
| 16 | -339002178646768313636024064 |