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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.

A346949 Value of the permanent of the matrix [1-zeta^{j-k}]_{1<=j,k<=2n}, where zeta is any primitive 2n-th root of unity.

Table of values

n a(n)
1 4
2 48
3 1440
4 80640
5 7257600
6 958003200
7 174356582400
8 41845579776000
9 12804747411456000
10 4865804016353280000
11 2248001455555215360000
12 1240896803466478878720000
13 806582922253211271168000000
14 609776689223427721003008000000
15 530505719624382117272616960000000
16 526261673867387060334436024320000000

List of values

[4, 48, 1440, 80640, 7257600, 958003200, 174356582400, 41845579776000, 12804747411456000, 4865804016353280000, 2248001455555215360000, 1240896803466478878720000, 806582922253211271168000000, 609776689223427721003008000000, 530505719624382117272616960000000, 526261673867387060334436024320000000]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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