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 | 13 |
| 2 | 169 |
| 3 | 741 |
| 4 | 4823 |
| 5 | 26845 |
| 6 | 158847 |
| 7 | 917293 |
| 8 | 5349227 |
| 9 | 31070195 |
| 10 | 180762387 |
| 11 | 1050937017 |
| 12 | 6111802359 |
| 13 | 35539343255 |
| 14 | 206667375733 |
| 15 | 1201779520773 |
| 16 | 6988465966781 |
| 17 | 40638445631355 |
| 18 | 236315996095075 |
| 19 | 1374196381175527 |