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) |
|---|---|
| 6 | 1 |
| 7 | 1623931 |
| 8 | 2900866919644 |
| 9 | 5135204548028317764 |
| 10 | 9097949506151746630368210 |
| 11 | 16117472448301015835209097979510 |
| 12 | 28553101725457044215054700034776694620 |