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 | 41 |
| 3 | 5993 |
| 4 | 1911281 |
| 5 | 1070544561 |
| 6 | 931648129241 |
| 7 | 1164230224629081 |
| 8 | 1977455909783346273 |
| 9 | 4384042247054153832161 |
| 10 | 12298460017360155919009801 |
| 11 | 42594621493418383255115778761 |
| 12 | 178534870708446720311905067877201 |
| 13 | 890813416549297707507952795640859793 |