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 | 56 |
| 3 | 2415 |
| 4 | 100352 |
| 5 | 4140081 |
| 6 | 170537640 |
| 7 | 7022359583 |
| 8 | 289143013376 |
| 9 | 11905151192865 |
| 10 | 490179860527896 |
| 11 | 20182531537581071 |
| 12 | 830989874753525760 |
| 13 | 34214941811800329425 |
| 14 | 1408756312731277540744 |