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 | 0 |
1 | 4 |
2 | 40 |
3 | 1128 |
4 | 61120 |
5 | 5466320 |
6 | 735847800 |
7 | 139910204080 |
8 | 35858685086352 |
9 | 11953187179149408 |
10 | 5037776918810353960 |
11 | 2623732639426967662648 |
12 | 1656984556235159516822400 |
13 | 1248959074762601252295551168 |