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) |
|---|---|
| 1 | 0 |
| 2 | 7 |
| 3 | 197 |
| 4 | 8018 |
| 5 | 556014 |
| 6 | 59740609 |
| 7 | 9174170011 |
| 8 | 1904975488436 |
| 9 | 513771331467372 |
| 10 | 174548332364311563 |
| 11 | 72920994844093191553 |
| 12 | 36737130036755448717350 |
| 13 | 21961934137099746053158010 |
| 14 | 15369599839081193169161637861 |