T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors.
A198285
T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =2a(6) =4a(7) =14a(8) =14a(9) =4a(10) =8a(11) =52a(12) =100a(13) =52a(14) =8a(15) =16a(16) =190a(17) =662a(18) =662a(19) =190a(20) =16a(21) =32a(22) =700a(23) =4588a(24) =8784a(25) =4588a(26) =700a(27) =32a(28) =64a(29) =2574
External references
- oeis: A198285