T(n,k) = number of n X k 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor.
A198906
T(n,k) = number of n X k 0..4 arrays with values 0..4 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) =33a(8) =33a(9) =5a(10) =15a(11) =380a(12) =1211a(13) =380a(14) =15a(15) =51a(16) =4801a(17) =50384a(18) =50384a(19) =4801a(20) =51a(21) =187a(22) =62004a(23) =2125425a(24) =6907736a(25) =2125425a(26) =62004a(27) =187a(28) =715a(29) =804833
External references
- oeis: A198906