Sum of neighbor maps: number of nX2 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 nX2 array.
A221663
Sum of neighbor maps: number of nX2 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 nX2 array.
Terms
- a(0) =2a(1) =12a(2) =48a(3) =256a(4) =856a(5) =4096a(6) =15872a(7) =65344a(8) =259584a(9) =1048576a(10) =4177632a(11) =16777216a(12) =67051520a(13) =268430336a(14) =1073479680a(15) =4294967296a(16) =17178580480a(17) =68719476736a(18) =274872664064
External references
- oeis: A221663