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

A234876

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

Terms

    a(0) =68a(1) =148a(2) =268a(3) =628a(4) =1188a(5) =2944a(6) =5684a(7) =14604a(8) =28492a(9) =74816a(10) =146772a(11) =390308a(12) =767956a(13) =2057064a(14) =4053820a(15) =10903852a(16) =21506484a(17) =57986664a(18) =114425348a(19) =308952828a(20) =609818236a(21) =1647911016a(22) =3253169924a(23) =8795476020a(24) =17364799332a(25) =46963065504

External references