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 | 3 |
| 2 | 13 |
| 3 | 53 |
| 4 | 859 |
| 5 | 880571 |
| 6 | 230836658783 |
| 7 | 18727694659923768688081143062632211180505377 |
| 8 | 1448985191439414787314128433365601157107793684026416650771108564122239 |