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 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 74 |
| 5 | 169112 |
| 6 | 39785643746726 |
| 7 | 37126652766640082937217814348006 |
| 8 | 558874591495497577231218517843968898077072559983411918227348931497772 |