T(n,k)=Number of nXk 0..6 arrays with every nonzero element less than or equal to some NW, E or S neighbor.

A203506

T(n,k)=Number of nXk 0..6 arrays with every nonzero element less than or equal to some NW, E or S neighbor.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =49a(5) =1a(6) =1a(7) =1554a(8) =1554a(9) =1a(10) =1a(11) =29701a(12) =296814a(13) =29701a(14) =1a(15) =1a(16) =481122a(17) =31795165a(18) =31795165a(19) =481122a(20) =1a(21) =1a(22) =7959529a(23) =3024812086a(24) =17549687172a(25) =3024812086a(26) =7959529a(27) =1a(28) =1a(29) =138035591

External references