Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 8.

A156446

Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 8.

Terms

    a(0) =1a(1) =2a(2) =10a(3) =18a(4) =308a(5) =1716a(6) =83987a(7) =644220a(8) =42440517a(9) =448032730a(10) =40142592042a(11) =617153224314

External references