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 | 9 |
4 | 92 |
5 | 510 |
6 | 7074 |
7 | 68040 |
8 | 1002224 |
9 | 12529944 |
10 | 228706920 |
11 | 3565888920 |
12 | 71035245192 |
13 | 1348127454960 |
14 | 30270949077264 |
15 | 661700017709640 |
16 | 16516072112482560 |
17 | 408336559236083520 |
18 | 11204399270843020224 |
19 | 309489391954850336640 |
20 | 9258803420755891835520 |