T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A222918
T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =6a(5) =0a(6) =6a(7) =18a(8) =18a(9) =6a(10) =16a(11) =136a(12) =160a(13) =136a(14) =16a(15) =16a(16) =654a(17) =2952a(18) =2952a(19) =654a(20) =16a(21) =40a(22) =3972a(23) =17518a(24) =62336a(25) =17518a(26) =3972a(27) =40a(28) =280a(29) =21778
External references
- oeis: A222918