A071306 - cp's OEIS frontend

A071306 a(n) = (1/2) * (number of n X n 0..6 matrices M with MM' mod 7 = I, where M' is the transpose of M and I is the n X n identity matrix).

n	a(n)
1	1
2	8
3	336
4	112896
5	276595200
6	4662288691200
7	546914437209907200
8	450219964711195607040000
9	2596509480922336727312302080000
10	104784757384177668346109081238896640000
11	29597339316082819652234687848790174733434880000

[1, 8, 336, 112896, 276595200, 4662288691200, 546914437209907200, 450219964711195607040000, 2596509480922336727312302080000, 104784757384177668346109081238896640000, 29597339316082819652234687848790174733434880000]

cp's OEIS Frontend

A071306 a(n) = (1/2) * (number of n X n 0..6 matrices M with MM' mod 7 = I, where M' is the transpose of M and I is the n X n identity matrix).

Table of values

List of values