T(n,k) is the number of (n+1) X (k+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).

A234450

T(n,k) is the number of (n+1) X (k+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).

Terms

    a(0) =160a(1) =1120a(2) =1120a(3) =8064a(4) =11574a(5) =8064a(6) =58720a(7) =125080a(8) =125080a(9) =58720a(10) =428800a(11) =1377422a(12) =2053280a(13) =1377422a(14) =428800a(15) =3137920a(16) =15269704a(17) =34601928a(18) =34601928a(19) =15269704a(20) =3137920a(21) =22953984a(22) =170001402a(23) =588663528a(24) =898985624a(25) =588663528a(26) =170001402

External references