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 | 18 |
4 | 0 |
5 | 180 |
6 | 23760 |
7 | 2520 |
8 | 1693440 |
9 | 180033840 |
10 | 107956800 |
11 | 42093263520 |
12 | 4131388800000 |
13 | 7363478041920 |
14 | 2262271571239680 |
15 | 213613512570057600 |
16 | 843365230060953600 |
17 | 226557537882970694400 |
18 | 20988751571439158707200 |
19 | 154613821575430253836800 |
20 | 38125864157166326661120000 |
21 | 3508865828606684108929766400 |