Number of n X n arrays of squares of integers with every 3X3 subblock summing to 4.

A159201

Number of n X n arrays of squares of integers with every 3X3 subblock summing to 4.

Terms

    a(0) =135a(1) =767a(2) =3223a(3) =10863a(4) =41455a(5) =133967a(6) =386559a(7) =1297583a(8) =3874159a(9) =10725327a(10) =34367791a(11) =100153391a(12) =275262975a(13) =866491247a(14) =2509423663a(15) =6914468943

External references