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 | 3 |
4 | 44 |
5 | 90 |
6 | 2394 |
7 | 6720 |
8 | 202544 |
9 | 1041768 |
10 | 27369000 |
11 | 170418600 |
12 | 5835999432 |
13 | 41711464080 |
14 | 1489935696144 |
15 | 14980499777880 |
16 | 519279726915840 |
17 | 5837621201012160 |
18 | 232228922844775104 |
19 | 2946339663605953920 |
20 | 122979308145781345920 |
21 | 1869847203939341074560 |