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 | 26 |
| 2 | 614 |
| 3 | 14520 |
| 4 | 315378 |
| 5 | 7272142 |
| 6 | 163361868 |
| 7 | 3709621842 |
| 8 | 83923710538 |
| 9 | 1901055652804 |
| 10 | 43046530809006 |
| 11 | 974841850791586 |
| 12 | 22075731493018104 |
| 13 | 499920666839751010 |
| 14 | 11321017480253759030 |
| 15 | 256371943510592766924 |