a(n) is the permanent of the n X n matrix M(n) that is defined by M[i,j] = i*j - floor(i*j/3).

A358159

a(n) is the permanent of the n X n matrix M(n) that is defined by M[i,j] = i*j - floor(i*j/3).

Terms

    a(0) =1a(1) =1a(2) =7a(3) =102a(4) =4396a(5) =374216a(6) =49857920a(7) =11344877568

External references