T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order.

A222608

T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =6a(5) =0a(6) =6a(7) =32a(8) =32a(9) =6a(10) =20a(11) =520a(12) =892a(13) =520a(14) =20a(15) =20a(16) =4556a(17) =42492a(18) =42492a(19) =4556a(20) =20a(21) =70a(22) =57072a(23) =779875a(24) =3584673a(25) =779875a(26) =57072a(27) =70a(28) =685a(29) =594544

External references