cp's OEIS Frontend

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.

A317403 a(n)=(-1)^((n-2)*(n-1)/2)*2^(n-1)*n^(n-3).

Table of values

n a(n)
1 1
2 1
3 -4
4 -32
5 400
6 6912
7 -153664
8 -4194304
9 136048896
10 5120000000
11 -219503494144
12 -10567230160896
13 564668382613504
14 33174037869887488
15 -2125764000000000000
16 -147573952589676412928
17 11034809241396899282944
18 884295678882933431599104
19 -75613185918270483380568064

List of values

[1, 1, -4, -32, 400, 6912, -153664, -4194304, 136048896, 5120000000, -219503494144, -10567230160896, 564668382613504, 33174037869887488, -2125764000000000000, -147573952589676412928, 11034809241396899282944, 884295678882933431599104, -75613185918270483380568064]