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 columnwise and nonincreasing rowwise.

A235665

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 columnwise and nonincreasing rowwise.

Terms

    a(0) =256a(1) =3038a(2) =3038a(3) =33610a(4) =105752a(5) =33610a(6) =344668a(7) =3405756a(8) =3377510a(9) =344668a(10) =3402366a(11) =98555090a(12) =314516602a(13) =97225212a(14) =3402366a(15) =32542312a(16) =2711168860a(17) =25757334784a(18) =25779181084a(19) =2654051460a(20) =32542312a(21) =304784986a(22) =71121044662

External references