T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.

A253524

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.

Terms

    a(0) =81a(1) =470a(2) =470a(3) =2180a(4) =2724a(5) =2180a(6) =9623a(7) =10706a(8) =10706a(9) =9623a(10) =42669a(11) =42476a(12) =30013a(13) =42476a(14) =42669a(15) =192393a(16) =169828a(17) =84684a(18) =84684a(19) =169828a(20) =192393a(21) =876277a(22) =666239a(23) =256914a(24) =162815a(25) =256914a(26) =666239a(27) =876277a(28) =4010555a(29) =2544290

External references