T(n,k)=Number of nXk 0..5 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

A203057

T(n,k)=Number of nXk 0..5 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

Terms

    a(0) =1a(1) =6a(2) =6a(3) =36a(4) =286a(5) =36a(6) =161a(7) =7820a(8) =7820a(9) =161a(10) =636a(11) =177290a(12) =1055370a(13) =177290a(14) =636a(15) =2507a(16) =4078368a(17) =125838722a(18) =125838722a(19) =4078368a(20) =2507a(21) =10213a(22) =96511488a(23) =15517802234a(24) =78243755382a(25) =15517802234a(26) =96511488a(27) =10213a(28) =42182a(29) =2282090278

External references