A353453 - cp's OEIS frontend

A353453 a(n) is the permanent of the n X n symmetric matrix M(n) that is defined as M[i,j] = abs(i - j) if min(i, j) < max(i, j) <= 2*min(i, j), and otherwise 0.

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	4
6	64
7	576
8	7844
9	63524
10	882772
11	11713408
12	252996564
13	5879980400
14	184839020672
15	5698866739200
16	229815005974352
17	9350598794677712
18	480306381374466176
19	23741710999960266176
20	1446802666239931811472
21	86153125248221968292928
22	6197781268948296566634304

[1, 0, 1, 0, 1, 4, 64, 576, 7844, 63524, 882772, 11713408, 252996564, 5879980400, 184839020672, 5698866739200, 229815005974352, 9350598794677712, 480306381374466176, 23741710999960266176, 1446802666239931811472, 86153125248221968292928, 6197781268948296566634304]

cp's OEIS Frontend

A353453 a(n) is the permanent of the n X n symmetric matrix M(n) that is defined as M[i,j] = abs(i - j) if min(i, j) < max(i, j) <= 2*min(i, j), and otherwise 0.

Table of values

List of values