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 | 3 |
3 | -7 |
4 | 39 |
5 | -31 |
6 | 1623 |
7 | 9953 |
8 | 182199 |
9 | 2116289 |
10 | 32269143 |
11 | 505278113 |
12 | 9743069559 |
13 | 214428606209 |
14 | 5156280298263 |
15 | 127321200213473 |
16 | 3176128419544119 |
17 | 80737907621585729 |
18 | 2147513299611040983 |
19 | 61423058495936864033 |
20 | 1912348969322283717879 |
21 | 64216042408215934910849 |