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 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

A235081

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 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

Terms

    a(0) =90a(1) =198a(2) =418a(3) =930a(4) =2002a(5) =4514a(6) =9838a(7) =22402a(8) =49294a(9) =113086a(10) =250886a(11) =579046a(12) =1294282a(13) =3002798a(14) =6759506a(15) =15755762a(16) =35708898a(17) =83589666a(18) =190685374a(19) =448116834a(20) =1028599870a(21) =2425881086a(22) =5600857366a(23) =13251905638a(24) =30761769178a(25) =72994149742

External references