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 | 6 |
4 | 12 |
5 | 20 |
6 | 1110 |
7 | 10122 |
8 | 58856 |
9 | 1239912 |
10 | 23773770 |
11 | 303367790 |
12 | 5442263772 |
13 | 135931189836 |
14 | 2868815413646 |
15 | 61708462976370 |
16 | 1696559552295120 |
17 | 48121891688969552 |
18 | 1323641220801211026 |
19 | 40678367069424137814 |
20 | 1372011621943725532100 |