T(n,k)=Number of nXk 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.

A203338

T(n,k)=Number of nXk 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =36a(8) =36a(9) =1a(10) =1a(11) =161a(12) =1311a(13) =161a(14) =1a(15) =1a(16) =846a(17) =27056a(18) =27056a(19) =846a(20) =1a(21) =1a(22) =5545a(23) =532547a(24) =2224079a(25) =532547a(26) =5545a(27) =1a(28) =1a(29) =35483

External references