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 | 5 |
3 | 20 |
4 | 90 |
5 | 470 |
6 | 2566 |
7 | 13885 |
8 | 74435 |
9 | 400530 |
10 | 2183930 |
11 | 12112167 |
12 | 68351005 |
13 | 392055575 |
14 | 2281947435 |
15 | 13450584580 |
16 | 80110426698 |
17 | 481032299830 |
18 | 2905955107950 |
19 | 17629836770715 |
20 | 107254895106265 |
21 | 653597751574541 |
22 | 3986386422481665 |
23 | 24321398369358070 |
24 | 148386468804372420 |
25 | 905156432977350225 |