Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 32.

A156493

Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 32.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =6a(4) =72a(5) =804a(6) =78655a(7) =960648a(8) =232585695a(9) =21668424870

External references