Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 nX4 array.
A221665
Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 nX4 array.
Terms
- a(0) =16a(1) =256a(2) =3772a(3) =63200a(4) =1048576a(5) =16777216a(6) =268281856a(7) =4294967296a(8) =68702508544
External references
- oeis: A221665