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 | 26 |
| 2 | 226 |
| 3 | -17524 |
| 4 | -760724 |
| 5 | 11764376 |
| 6 | 2017502776 |
| 7 | 20691256976 |
| 8 | -5817161063024 |
| 9 | -225734712752224 |
| 10 | 17690399773689376 |
| 11 | 1475756601500931776 |
| 12 | -49197807240738185024 |
| 13 | -9248228636364224401024 |
| 14 | 47353227812848547963776 |
| 15 | 59495024332228675973509376 |