Number of (n+1)X(2+1) 0..6 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 18.

A233991

Number of (n+1)X(2+1) 0..6 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 18.

Terms

    a(0) =774a(1) =3040a(2) =11622a(3) =51026a(4) =218602a(5) =1058618a(6) =4923910a(7) =25667010a(8) =126489782a(9) =690800294a(10) =3533497602a(11) =19797058950a(12) =103613461346a(13) =587718236894

External references