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 | 2 |
| 2 | 11 |
| 3 | 108 |
| 4 | 1501 |
| 5 | 26910 |
| 6 | 590519 |
| 7 | 15326584 |
| 8 | 459207001 |
| 9 | 15597711450 |
| 10 | 592253828099 |
| 11 | 24859063068708 |
| 12 | 1142924647332469 |
| 13 | 57121373303554742 |
| 14 | 3083411233744623599 |
| 15 | 178780730183884614000 |
| 16 | 11081321860167101444401 |
| 17 | 731188462040844810716466 |
| 18 | 51172111020998969648708219 |