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) |
|---|---|
| 0 | 2 |
| 1 | 199 |
| 2 | 39603 |
| 3 | 7881196 |
| 4 | 1568397607 |
| 5 | 312119004989 |
| 6 | 62113250390418 |
| 7 | 12360848946698171 |
| 8 | 2459871053643326447 |
| 9 | 489526700523968661124 |
| 10 | 97418273275323406890123 |
| 11 | 19386725908489881939795601 |
| 12 | 3858055874062761829426214722 |