Equals one maps: number of n X 2 binary arrays indicating the locations of corresponding elements equal to exactly one of their king-move neighbors in a random 0..3 n X 2 array.
A221587
Equals one maps: number of n X 2 binary arrays indicating the locations of corresponding elements equal to exactly one of their king-move neighbors in a random 0..3 n X 2 array.
Terms
- a(0) =2a(1) =8a(2) =40a(3) =180a(4) =772a(5) =3264a(6) =13634a(7) =56456a(8) =232150a(9) =949520a(10) =3867132a(11) =15696660a(12) =63539998a(13) =256648344a(14) =1034811554a(15) =4166389484a(16) =16755205300a(17) =67316907560a(18) =270245535066
External references
- oeis: A221587