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 | 15 |
| 2 | 97 |
| 3 | -2385 |
| 4 | -73023 |
| 5 | 125775 |
| 6 | 48621345 |
| 7 | 632724975 |
| 8 | -34073850495 |
| 9 | -1159018131825 |
| 10 | 21867803792865 |
| 11 | 1811560265628975 |
| 12 | -3616463755919295 |
| 13 | -2836803524344895025 |
| 14 | -36534257175323718495 |
| 15 | 4535538057996196107375 |
| 16 | 138178844646564481121025 |