T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.

A235430

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.

Terms

    a(0) =256a(1) =3038a(2) =3038a(3) =33610a(4) =112442a(5) =33610a(6) =344668a(7) =3874844a(8) =3874844a(9) =344668a(10) =3402366a(11) =119751976a(12) =439379938a(13) =119751976a(14) =3402366a(15) =32542312a(16) =3475660106a(17) =44578500538a(18) =44578500538a(19) =3475660106a(20) =32542312a(21) =304784986a(22) =95292647278

External references