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 | 2 |
3 | 6 |
4 | 32 |
5 | 220 |
6 | 1812 |
7 | 17108 |
8 | 180512 |
9 | 2093760 |
10 | 26396160 |
11 | 358741328 |
12 | 5223336288 |
13 | 81079811280 |
14 | 1336407320080 |
15 | 23311138957200 |
16 | 429063111959808 |
17 | 8311760620707648 |
18 | 169072470759431232 |
19 | 3603666131945918144 |
20 | 80327823251439861760 |
21 | 1869212211081119135616 |
22 | 45331401566332423284864 |
23 | 1143967734536203174726784 |
24 | 29996686272924492809481216 |
25 | 816185909551276017516640000 |