T(n,k) = number of n X k 0..6 arrays with values 0..6 introduced in row major order and no element equal to any horizontal or vertical neighbor.
A198723
T(n,k) = number of n X k 0..6 arrays with values 0..6 introduced in row major order and no element equal to any horizontal or vertical neighbor.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =2a(6) =5a(7) =34a(8) =34a(9) =5a(10) =15a(11) =499a(12) =2027a(13) =499a(14) =15a(15) =52a(16) =10507a(17) =232841a(18) =232841a(19) =10507a(20) =52a(21) =203a(22) =272410a(23) =34003792a(24) =173549032a(25) =34003792a(26) =272410a(27) =203a(28) =876a(29) =7817980
External references
- oeis: A198723