T(n,k)=Number of nXk 0..2 arrays with no more than floor(nXk/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
A222853
T(n,k)=Number of nXk 0..2 arrays with no more than floor(nXk/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =7a(5) =2a(6) =10a(7) =51a(8) =51a(9) =10a(10) =24a(11) =391a(12) =737a(13) =391a(14) =24a(15) =72a(16) =2894a(17) =19446a(18) =19446a(19) =2894a(20) =72a(21) =168a(22) =22491a(23) =292257a(24) =1020085a(25) =292257a(26) =22491a(27) =168a(28) =664a(29) =173099
External references
- oeis: A222853