Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

A235083

Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

Terms

    a(0) =478a(1) =930a(2) =1758a(3) =3558a(4) =7046a(5) =14702a(6) =29970a(7) =63862a(8) =132746a(9) =287122a(10) =605338a(11) =1324402a(12) =2823950a(13) =6237794a(14) =13432462a(15) =29925830a(16) =65041174a(17) =146070222a(18) =320349666a(19) =724993878a(20) =1604290682a(21) =3657668498a(22) =8165829930a(23) =18749536114a(24) =42223278878

External references