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 | 7 |
2 | 21 |
3 | 21 |
4 | -63 |
5 | -231 |
6 | -15 |
7 | 1521 |
8 | 3073 |
9 | -4319 |
10 | -29631 |
11 | -29631 |
12 | 143361 |
13 | 489345 |
14 | -255 |
15 | -3342591 |
16 | -6684671 |
17 | 9454081 |
18 | 64553985 |
19 | 64553985 |
20 | -311689215 |
21 | -1064175615 |
22 | -4095 |
23 | 7266627585 |
24 | 14533263361 |
25 | -20553129983 |
26 | -140345589759 |
27 | -140345589759 |
28 | 677648531457 |
29 | 2313636773889 |