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.

A384077 a(n) = neg(M(n)), where M(n) is the n X n left circulant matrix with (row 1) = (1,3,5,7, ..., 2n - 1), and neg(M(n)) is the negative part of the determinant of M(n); see A380661.

Table of values

n a(n)
1 0
2 -9
3 -153
4 -2668
5 -200200
6 -20916552
7 -2515242520
8 -404114856640
9 -84096850828032
10 -21708790967664000
11 -6808856052755927808
12 -2552126898198385479168
13 -1126589571631974396251136
14 -578462264691449080954733568
15 -341831898528862885226121600000

List of values

[0, -9, -153, -2668, -200200, -20916552, -2515242520, -404114856640, -84096850828032, -21708790967664000, -6808856052755927808, -2552126898198385479168, -1126589571631974396251136, -578462264691449080954733568, -341831898528862885226121600000]