T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.
A222832
T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =4a(5) =0a(6) =6a(7) =32a(8) =32a(9) =6a(10) =20a(11) =613a(12) =2120a(13) =613a(14) =20a(15) =20a(16) =7152a(17) =114782a(18) =114782a(19) =7152a(20) =20a(21) =70a(22) =117140a(23) =5459252a(24) =23567385a(25) =5459252a(26) =117140a(27) =70a(28) =685a(29) =1613820
External references
- oeis: A222832