Number of n X n arrays of squares of integers with every 3X3 subblock summing to 15.

A159215

Number of n X n arrays of squares of integers with every 3X3 subblock summing to 15.

Terms

    a(0) =3480a(1) =37772a(2) =213728a(3) =864276a(4) =4577552a(5) =19067804a(6) =73644648a(7) =370791068a(8) =1692340016a(9) =7824640020

External references