T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every element both >= and <= some horizontal, vertical or antidiagonal neighbor.

A232204

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every element both >= and <= some horizontal, vertical or antidiagonal neighbor.

Terms

    a(0) =15a(1) =109a(2) =109a(3) =685a(4) =2129a(5) =685a(6) =4483a(7) =39651a(8) =39651a(9) =4483a(10) =29469a(11) =745157a(12) =2064527a(13) =745157a(14) =29469a(15) =193531a(16) =14015499a(17) =108997581a(18) =108997581a(19) =14015499a(20) =193531a(21) =1270657a(22) =263553379a(23) =5765893981a(24) =16237318767a(25) =5765893981a(26) =263553379a(27) =1270657

External references