Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

A235234

Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

Terms

    a(0) =1328a(1) =3688a(2) =9656a(3) =28400a(4) =78824a(5) =241456a(6) =698304a(7) =2200992a(8) =6566416a(9) =21133848a(10) =64625520a(11) =211345224a(12) =659476792a(13) =2184169416a(14) =6931496536a(15) =23195106736a(16) =74666215624a(17) =252015025392a(18) =821113460448

External references