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 | 0 |
2 | 2 |
3 | 0 |
4 | 12 |
5 | 48 |
6 | 180 |
7 | 2016 |
8 | 15120 |
9 | 72576 |
10 | 1424304 |
11 | 11249280 |
12 | 113164128 |
13 | 2066238720 |
14 | 22751977248 |
15 | 303261573888 |
16 | 6400216892160 |
17 | 85934653249536 |
18 | 1440131337066240 |
19 | 34330891188013056 |
20 | 549029461368181248 |
21 | 11212163885207900160 |
22 | 296439802585781976576 |