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 | 7 |
| 1 | 6 |
| 2 | 11 |
| 3 | 19 |
| 4 | 37 |
| 5 | 109 |
| 6 | 515 |
| 7 | 3301 |
| 8 | 267271 |
| 9 | 130914197 |
| 10 | 209015618081 |
| 11 | 887384060899271 |
| 12 | 58605404461258015758293 |