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 | 4 |
2 | 20 |
3 | 104 |
4 | 540 |
5 | 2804 |
6 | 14560 |
7 | 75604 |
8 | 392580 |
9 | 2038504 |
10 | 10585100 |
11 | 54964004 |
12 | 285405120 |
13 | 1481989604 |
14 | 7695353140 |
15 | 39958755304 |
16 | 207489129660 |
17 | 1077404403604 |
18 | 5594511147680 |
19 | 29049960142004 |
20 | 150844311857700 |
21 | 783271519430504 |