Equals two maps: number of n X 4 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 n X 4 array.
A220318
Equals two maps: number of n X 4 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 n X 4 array.
Terms
- a(0) =4a(1) =89a(2) =3167a(3) =56819a(4) =984087a(5) =16290350a(6) =264901883
External references
- oeis: A220318