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

A238180

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

Terms

    a(0) =81a(1) =423a(2) =423a(3) =2329a(4) =5321a(5) =2329a(6) =13447a(7) =69023a(8) =69023a(9) =13447a(10) =79641a(11) =938601a(12) =2027833a(13) =938601a(14) =79641a(15) =479703a(16) =12951743a(17) =62220767a(18) =62220767a(19) =12951743a(20) =479703a(21) =2918233a(22) =180345769a(23) =1917124097a(24) =4299264833a(25) =1917124097a(26) =180345769a(27) =2918233a(28) =17859079

External references