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 | 3 |
2 | -15 |
3 | 69 |
4 | -327 |
5 | 1545 |
6 | -7311 |
7 | 34593 |
8 | -163695 |
9 | 774609 |
10 | -3665487 |
11 | 17345265 |
12 | -82078671 |
13 | 388400433 |
14 | -1837930575 |
15 | 8697180849 |
16 | -41155501647 |
17 | 194749924785 |
18 | -921566538831 |
19 | 4360899684273 |
20 | -20635998872655 |
21 | 97650595130289 |
22 | -462087577545807 |
23 | 2186621894493105 |