T(n,k)=Number of nXk 0..3 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..3 introduced in row major order.
A240629
T(n,k)=Number of nXk 0..3 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..3 introduced in row major order.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =10a(5) =4a(6) =12a(7) =109a(8) =109a(9) =12a(10) =40a(11) =1332a(12) =4369a(13) =1332a(14) =40a(15) =143a(16) =16624a(17) =180480a(18) =180480a(19) =16624a(20) =143a(21) =528a(22) =208015a(23) =7462748a(24) =24648700a(25) =7462748a(26) =208015a(27) =528a(28) =1979a(29) =2604059
External references
- oeis: A240629