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

A237511

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

Terms

    a(0) =81a(1) =328a(2) =328a(3) =1342a(4) =1724a(5) =1342a(6) =5622a(7) =9108a(8) =9108a(9) =5622a(10) =23545a(11) =50876a(12) =62031a(13) =50876a(14) =23545a(15) =97700a(16) =284368a(17) =462206a(18) =462206a(19) =284368a(20) =97700a(21) =406008a(22) =1553960a(23) =3489965a(24) =4882448a(25) =3489965a(26) =1553960a(27) =406008a(28) =1690160a(29) =8478776

External references