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 | 1 |
2 | 4 |
3 | 15 |
4 | 90 |
5 | 555 |
6 | 4815 |
7 | 41034 |
8 | 443268 |
9 | 4977381 |
10 | 64274655 |
11 | 857332366 |
12 | 13328296014 |
13 | 207666642131 |
14 | 3620701556017 |
15 | 65845797790798 |
16 | 1294049887432888 |
17 | 26168756518235801 |
18 | 576107273399556987 |
19 | 12940593913711504118 |
20 | 311924384689270232770 |
21 | 7752903433736003497447 |
22 | 203126367130952306670541 |