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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 614 |
| 5 | 206 |
| 6 | 463 |
| 7 | 8435 |
| 8 | 4872 |
| 9 | 17870 |
| 10 | 1234535428 |
| 11 | 182846450 |
| 12 | 693391108 |
| 13 | 96110089192 |
| 14 | 205761216947625578 |
| 15 | 8024691291572288542 |
| 16 | 3078189274921062476618 |
| 17 | 5669380917941142205058 |
| 18 | 61952555082544875480446 |