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 | 0 |
3 | 3 |
4 | 6 |
5 | 20 |
6 | 360 |
7 | 2394 |
8 | 17220 |
9 | 260280 |
10 | 3076920 |
11 | 35980560 |
12 | 595686960 |
13 | 9760411440 |
14 | 159321570408 |
15 | 3093987619800 |
16 | 63314740616400 |
17 | 1318245318411840 |
18 | 30240056863978560 |
19 | 736919729169603840 |
20 | 18522487833889334400 |
21 | 495842871278901363840 |
22 | 14014346231616983128800 |