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 | 226 |
| 4 | 25538 |
| 5 | 2885794 |
| 6 | 326094722 |
| 7 | 36848703586 |
| 8 | 4163903505218 |
| 9 | 470521096089634 |
| 10 | 53168883858128642 |
| 11 | 638026606623638426 |
| 12 | 6008083875968536546 |
| 13 | 6789793858544278594 |