A350549 - cp's OEIS frontend

A350549 a(n) is the permanent of a square matrix M(n) whose general element M_{i,j} is defined by floor((j - i + 1)/2).

n	a(n)
0	1
1	0
2	0
3	-1
4	2
5	20
6	-120
7	-4608
8	41952
9	2325024
10	-34876800
11	-3133087200
12	66120252480
13	8258565859200
14	-239533775631360
15	-40631838221721600
16	1532513262269767680
17	335620705700380262400
18	-16054693916748370329600
19	-4428138916386119015424000
20	261291002534430572648448000

[1, 0, 0, -1, 2, 20, -120, -4608, 41952, 2325024, -34876800, -3133087200, 66120252480, 8258565859200, -239533775631360, -40631838221721600, 1532513262269767680, 335620705700380262400, -16054693916748370329600, -4428138916386119015424000, 261291002534430572648448000]

cp's OEIS Frontend

A350549 a(n) is the permanent of a square matrix M(n) whose general element M_{i,j} is defined by floor((j - i + 1)/2).

Table of values

List of values