T(n,k)=Number of nXk 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor.

A203397

T(n,k)=Number of nXk 0..3 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) =16a(5) =1a(6) =1a(7) =185a(8) =185a(9) =1a(10) =1a(11) =1455a(12) =7785a(13) =1455a(14) =1a(15) =1a(16) =10804a(17) =210342a(18) =210342a(19) =10804a(20) =1a(21) =1a(22) =83876a(23) =5666072a(24) =18530502a(25) =5666072a(26) =83876a(27) =1a(28) =1a(29) =661595

External references