Half the number of 4 X n binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.
A069397
Half the number of 4 X n binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.
Terms
- a(0) =1a(1) =67a(2) =2427a(3) =66579a(4) =1565371a(5) =33438451a(6) =669776139a(7) =12817737731a(8) =237180629275
External references
- oeis: A069397