Sum of neighbor maps: number of 2 X n 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 2 X n array.
A221667
Sum of neighbor maps: number of 2 X n 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 2 X n array.
Terms
- a(0) =4a(1) =12a(2) =64a(3) =256a(4) =992a(5) =4096a(6) =16384a(7) =65344a(8) =262144a(9) =1048576a(10) =4193280a(11) =16777216a(12) =67108864a(13) =268430336a(14) =1073741824a(15) =4294967296a(16) =17179844608a(17) =68719476736a(18) =274877906944
External references
- oeis: A221667