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 | 1 |
1 | 4 |
2 | 40 |
3 | 600 |
4 | 12000 |
5 | 300000 |
6 | 9000000 |
7 | 315000000 |
8 | 12600000000 |
9 | 567000000000 |
10 | 28350000000000 |
11 | 1559250000000000 |
12 | 93555000000000000 |
13 | 6081075000000000000 |
14 | 425675250000000000000 |
15 | 31925643750000000000000 |