T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
A222889
T(n,k)=Number of nXk 0..2 arrays with exactly 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) =0a(2) =0a(3) =0a(4) =4a(5) =0a(6) =6a(7) =22a(8) =22a(9) =6a(10) =16a(11) =184a(12) =380a(13) =184a(14) =16a(15) =16a(16) =1222a(17) =8986a(18) =8986a(19) =1222a(20) =16a(21) =40a(22) =9918a(23) =138026a(24) =465938a(25) =138026a(26) =9918a(27) =40a(28) =280a(29) =73038
External references
- oeis: A222889