T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

A238145

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

Terms

    a(0) =256a(1) =1810a(2) =1810a(3) =12981a(4) =22698a(5) =12981a(6) =94458a(7) =292176a(8) =292176a(9) =94458a(10) =687254a(11) =3817216a(12) =6799917a(13) =3817216a(14) =687254a(15) =4977790a(16) =49554382a(17) =160133604a(18) =160133604a(19) =49554382a(20) =4977790a(21) =36125717a(22) =642717388a(23) =3756442630a(24) =6863396252a(25) =3756442630

External references