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) |
---|---|
1 | 1 |
2 | 0 |
3 | 6 |
4 | 12 |
5 | 340 |
6 | 2340 |
7 | 58338 |
8 | 786240 |
9 | 20890224 |
10 | 428954400 |
11 | 12845444040 |
12 | 351885980160 |
13 | 12049309321608 |
14 | 408370359196800 |
15 | 15960347878230000 |
16 | 639599649237319680 |
17 | 28303809398414031360 |
18 | 1302999243310662912000 |
19 | 64651744760744124697536 |
20 | 3352722890027561625600000 |