Let A(n) be the matrix in the group GL(n,2) such that for 1<=i, j<=n: A[i,j] = 1 if i+j = n+1 A[i,j] = 0 if i+j != n+1. a(n) is the size of the conjugacy class of A(n) in GL(n,2).

A087918

Let A(n) be the matrix in the group GL(n,2) such that for 1<=i, j<=n: A[i,j] = 1 if i+j = n+1 A[i,j] = 0 if i+j != n+1. a(n) is the size of the conjugacy class of A(n) in GL(n,2).