A347281 - cp's OEIS frontend

A347281 a(n) = 2^(n - 1)permanent(M_n)^2 where M_n is the n X n matrix M_n(j, k) = cos(Pij*k/n).

n	a(n)
1	1
2	2
3	4
4	0
5	36
6	288
7	144
8	18432
9	11664
10	115200
11	144400
12	0
13	808151184
14	133693952
15	262440000
16	299649466368
17	7937314520976
18	73575242956800
19	21204146201616
20	6459752448000000
21	212406372892224
22	8753824001424826368
23	195844025123172289600
24	152252829159294763008
25	26487254903393025000000

[1, 2, 4, 0, 36, 288, 144, 18432, 11664, 115200, 144400, 0, 808151184, 133693952, 262440000, 299649466368, 7937314520976, 73575242956800, 21204146201616, 6459752448000000, 212406372892224, 8753824001424826368, 195844025123172289600, 152252829159294763008, 26487254903393025000000]

cp's OEIS Frontend

A347281 a(n) = 2^(n - 1)permanent(M_n)^2 where M_n is the n X n matrix M_n(j, k) = cos(Pij*k/n).

Table of values

List of values

cp's OEIS Frontend

A347281 a(n) = 2^(n - 1)*permanent(M_n)^2 where M_n is the n X n matrix M_n(j, k) = cos(Pi*j*k/n).

Table of values

List of values

A347281 a(n) = 2^(n - 1)permanent(M_n)^2 where M_n is the n X n matrix M_n(j, k) = cos(Pij*k/n).