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 | 2 |
2 | 0 |
3 | 4 |
4 | -8 |
5 | 16 |
6 | -40 |
7 | 144 |
8 | -512 |
9 | 1696 |
10 | -5696 |
11 | 19840 |
12 | -70048 |
13 | 247744 |
14 | -880128 |
15 | 3152768 |
16 | -11386624 |
17 | 41389568 |
18 | -151273728 |
19 | 555794944 |
20 | -2052141056 |
21 | 7610274816 |
22 | -28331018240 |
23 | 105833345024 |
24 | -396594444800 |
25 | 1490425179136 |
26 | -5615651143680 |
27 | 21209004267520 |
28 | -80276663808000 |