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 | 2 |
2 | 5 |
3 | 20 |
4 | 90 |
5 | 440 |
6 | 2266 |
7 | 12110 |
8 | 66525 |
9 | 373320 |
10 | 2130865 |
11 | 12332512 |
12 | 72202860 |
13 | 426861830 |
14 | 2544727475 |
15 | 15280236800 |
16 | 92333523153 |
17 | 561054410200 |
18 | 3426075429740 |
19 | 21013974400920 |
20 | 129403499560500 |
21 | 799733464576880 |
22 | 4958649842375975 |
23 | 30837325310579350 |