T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock equal.

A237090

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock equal.

Terms

    a(0) =256a(1) =912a(2) =912a(3) =3274a(4) =3968a(5) =3274a(6) =12590a(7) =17636a(8) =17636a(9) =12590a(10) =48864a(11) =84918a(12) =96104a(13) =84918a(14) =48864a(15) =194812a(16) =412158a(17) =578486a(18) =578486a(19) =412158a(20) =194812a(21) =782024a(22) =2074898a(23) =3497586a(24) =4428988a(25) =3497586a(26) =2074898a(27) =782024a(28) =3181960a(29) =10501584

External references