Sum of neighbor maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal and vertical neighbors in a random 0..3 nX2 array.
A220801
Sum of neighbor maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal and vertical neighbors in a random 0..3 nX2 array.
Terms
- a(0) =2a(1) =16a(2) =48a(3) =256a(4) =928a(5) =4096a(6) =15820a(7) =65536a(8) =259584a(9) =1048576a(10) =4182016a(11) =16777216a(12) =67051520a(13) =268435456a(14) =1073476576a(15) =4294967296a(16) =17178689536a(17) =68719476736a(18) =274872664064
External references
- oeis: A220801