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 | 5 |
| 2 | 11 |
| 3 | 59 |
| 4 | 179 |
| 5 | 1259 |
| 6 | 7559 |
| 7 | 37799 |
| 8 | 415799 |
| 9 | 1135133999 |
| 10 | 5499724229999 |
| 11 | 29220034833989999 |
| 12 | 1408101540804746673385499999 |
| 13 | 43673268652925265723884051023987499999 |