A359111 - cp's OEIS frontend

A359111 a(n) is the permanent of the n X n matrix M(n) that is defined by M[i,j] = sigma(gcd(i,j)).

n	a(n)
0	1
1	1
2	4
3	22
4	266
5	2218
6	58100
7	644828
8	20949776
9	502226904
10	20622109728
11	339816568512
12	29770028441472
13	568704136553760
14	31544507027061120
15	1864702918415957568
16	150882403284582339072
17	3672279699978976000896
18	458988841789031457035136
19	12369374876487501375431040

[1, 1, 4, 22, 266, 2218, 58100, 644828, 20949776, 502226904, 20622109728, 339816568512, 29770028441472, 568704136553760, 31544507027061120, 1864702918415957568, 150882403284582339072, 3672279699978976000896, 458988841789031457035136, 12369374876487501375431040]

cp's OEIS Frontend

A359111 a(n) is the permanent of the n X n matrix M(n) that is defined by M[i,j] = sigma(gcd(i,j)).

Table of values

List of values