Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.

A251027

Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.

Terms

    a(0) =126955a(1) =334167a(2) =608267a(3) =1199576a(4) =2203974a(5) =4230166a(6) =7948184a(7) =15543033a(8) =30783775a(9) =63428115a(10) =133806457a(11) =290589257a(12) =642273542a(13) =1441935948a(14) =3266407237a(15) =7449665312a(16) =17053708629a(17) =39139562962a(18) =89950860174a(19) =206910386515a(20) =476167313927

External references