Number of 2n X 2 0..4 arrays with values 0..4 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors.
A198535
Number of 2n X 2 0..4 arrays with values 0..4 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors.
Terms
- a(0) =5a(1) =404a(2) =67442a(3) =11739910a(4) =2048681430a(5) =357559607382
External references
- oeis: A198535