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 | 0 |
2 | 2 |
3 | 6 |
4 | 150 |
5 | 27030 |
6 | 2523490710 |
7 | 7608434000728254870 |
8 | 199931532107794273605284333428918544790 |
9 | 47758914269546354982683078068829456704164423862093743397580034411621752859030 |