Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 4 and every element equal to at least one neighbor.

A146090

Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 4 and every element equal to at least one neighbor.

Terms

    a(0) =1a(1) =93a(2) =538a(3) =1532a(4) =3630a(5) =7540a(6) =14138a(7) =24480a(8) =39802a(9) =61520a(10) =91230a(11) =130708a(12) =181910a(13) =246972a(14) =328210a(15) =428120a(16) =549378a(17) =694840a(18) =867542a(19) =1070700a(20) =1307710a(21) =1582148a(22) =1897770a(23) =2258512a(24) =2668490a(25) =3132000a(26) =3653518a(27) =4237700a(28) =4889382a(29) =5613580

External references