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 | 0 |
3 | 6 |
4 | 12 |
5 | 20 |
6 | 1110 |
7 | 7602 |
8 | 35336 |
9 | 1103832 |
10 | 14984010 |
11 | 134552990 |
12 | 3457329612 |
13 | 70828191876 |
14 | 1017237973934 |
15 | 25648737955050 |
16 | 676111332667920 |
17 | 13760810592066992 |
18 | 373071111301807506 |
19 | 11594147432172228918 |
20 | 307097278689726728660 |
21 | 9330499711181779575900 |