T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.

A221800

T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =0a(4) =5a(5) =0a(6) =1a(7) =12a(8) =12a(9) =1a(10) =0a(11) =39a(12) =12a(13) =39a(14) =0a(15) =1a(16) =112a(17) =207a(18) =207a(19) =112a(20) =1a(21) =0a(22) =338a(23) =470a(24) =3074a(25) =470a(26) =338a(27) =0a(28) =1a(29) =1001

External references