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 | 3 |
| 4 | 5 |
| 5 | 11 |
| 6 | 41 |
| 7 | 371 |
| 8 | 13901 |
| 9 | 5033531 |
| 10 | 69782910161 |
| 11 | 351229174914190691 |
| 12 | 24509789089655802510792656021 |
| 13 | 8608552999157278575508415639286249242844899051 |