348564

Appears in sequences

• Number of free hexagonal polygons of symmetry class C_(2v) and area n.at n=18A120991
• a(n) is the decimal representation of the binary number with string structure 10s00, s in {0,1}*, such that it results in a non-palindromic cycle of length 4 in the Reverse and Add! procedure in base 2 and is not in the trajectory of any m < a(n).at n=18A306516