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 | 19 |
| 2 | 37 |
| 3 | 73 |
| 4 | 577 |
| 5 | 1153 |
| 6 | 588097 |
| 7 | 1175617 |
| 8 | 2350081 |
| 9 | 18772993 |
| 10 | 4877942342401 |
| 11 | 40459828019985257473 |
| 12 | 161680527238968327169 |
| 13 | 323202386497090728961 |
| 14 | 10317126837306838775329 |
| 15 | 171065716870341976441855042753 |