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 | 61 |
| 3 | 1936 |
| 4 | 89986 |
| 5 | 4791784 |
| 6 | 272005507 |
| 7 | 15929826713 |
| 8 | 951610091294 |
| 9 | 57659992554993 |
| 10 | 3532378891197016 |
| 11 | 218331197907776846 |
| 12 | 13594369669588615612 |