Sum of neighbor maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal and antidiagonal neighbors in a random 0..2 2Xn array.
A222387
Sum of neighbor maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal and antidiagonal neighbors in a random 0..2 2Xn array.
Terms
- a(0) =4a(1) =16a(2) =48a(3) =248a(4) =1024a(5) =3968a(6) =15872a(7) =65536a(8) =262144a(9) =1048576a(10) =4177632a(11) =16777216a(12) =67108864a(13) =268435456a(14) =1073479680a(15) =4294961152a(16) =17179869184a(17) =68719378432a(18) =274872664064
External references
- oeis: A222387