Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 16.
A156465
Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 16.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =3a(4) =7a(5) =36a(6) =201a(7) =9522a(8) =78762a(9) =5281910a(10) =225908440a(11) =34459271550
External references
- oeis: A156465