153187

Appears in sequences

• Hexagonal cata-condensed helicenes with n cells (non-planar cata-fused benzenoid hydrocarbons).at n=12A038143
• a(n) is the initial transient (converted to base 10), before the periodic part, on the n-th diagonal from the left of rule-30 1-D cellular automaton, when started from a single ON cell, or -1 if there is no transient part.at n=35A364241