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 | 1 |
| 1 | 7 |
| 2 | 8 |
| 3 | 15 |
| 4 | 113 |
| 5 | 3405 |
| 6 | 23948 |
| 7 | 27353 |
| 8 | 51301 |
| 9 | 386460 |
| 10 | 11645101 |
| 11 | 81902167 |
| 12 | 93547268 |
| 13 | 175449435 |
| 14 | 1321693313 |
| 15 | 39826248825 |
| 16 | 280105435088 |
| 17 | 319931683913 |
| 18 | 600037119001 |
| 19 | 4520191516920 |
| 20 | 136205782626601 |
| 21 | 957960669903127 |
| 22 | 1094166452529728 |
| 23 | 2052127122432855 |