Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 36.

A156499

Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 36.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =7a(4) =15a(5) =150a(6) =1830a(7) =136182a(8) =3730237a(9) =747469740a(10) =63910429200

External references