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

A237951

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

Terms

    a(0) =256a(1) =1460a(2) =1460a(3) =8291a(4) =12218a(5) =8291a(6) =50268a(7) =102396a(8) =102396a(9) =50268a(10) =303996a(11) =945688a(12) =1268436a(13) =945688a(14) =303996a(15) =1843152a(16) =8557942a(17) =17612024a(18) =17612024a(19) =8557942a(20) =1843152a(21) =11184876a(22) =78337964a(23) =235951750a(24) =386513430a(25) =235951750a(26) =78337964a(27) =11184876

External references