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

A234259

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

Terms

    a(0) =20a(1) =46a(2) =104a(3) =244a(4) =560a(5) =1336a(6) =3104a(7) =7504a(8) =17600a(9) =42976a(10) =101504a(11) =249664a(12) =592640a(13) =1465216a(14) =3490304a(15) =8660224a(16) =20679680a(17) =51437056a(18) =123029504a(19) =306525184a(20) =733982720a(21) =1830762496a(22) =4387119104a(23) =10951020544a(24) =26255605760a(25) =65571905536a(26) =157265199104

External references