Sum of neighbor maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX2 array.
A222445
Sum of neighbor maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX2 array.
Terms
- a(0) =2a(1) =14a(2) =64a(3) =210a(4) =1024a(5) =4000a(6) =16288a(7) =65536a(8) =260080a(9) =1048576a(10) =4191744a(11) =16774656a(12) =67108864a(13) =268379104a(14) =1073741824a(15) =4294909952a(16) =17179811840a(17) =68719476736a(18) =274876642816
External references
- oeis: A222445