T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order rowwise and columnwise.

A235565

T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order rowwise and columnwise.

Terms

    a(0) =81a(1) =537a(2) =537a(3) =3199a(4) =8345a(5) =3199a(6) =17837a(7) =113391a(8) =113391a(9) =17837a(10) =95679a(11) =1383617a(12) =3793647a(13) =1383617a(14) =95679a(15) =498597a(16) =15633605a(17) =114840543a(18) =114840543a(19) =15633605a(20) =498597a(21) =2546207a(22) =165947729a(23) =3160338477a(24) =9226436673a(25) =3160338477a(26) =165947729

External references