Number of n X n 0..3 matrices whose square is also a 0..3 matrix.
A213985
Number of n X n 0..3 matrices whose square is also a 0..3 matrix.
Terms
- a(0) =2a(1) =36a(2) =2546a(3) =604639a(4) =421195466a(5) =801373175814
External references
- oeis: A213985