Number of (n+1) X (1+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6 (constant-stress 1 X 1 tilings).

A235303

Number of (n+1) X (1+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6 (constant-stress 1 X 1 tilings).

Terms

    a(0) =70a(1) =210a(2) =518a(3) =1554a(4) =4006a(5) =12018a(6) =32006a(7) =96018a(8) =261670a(9) =785010a(10) =2173958a(11) =6521874a(12) =18267046a(13) =54801138a(14) =154764806a(15) =464294418a(16) =1319524390a(17) =3958573170a(18) =11307598598a(19) =33922795794a(20) =97317170086a(21) =291951510258a(22) =840713542406

External references