395390

Appears in sequences

• Number of (n+2) X (3+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.at n=11A261108
• Number of polygon edges formed when every pair of vertices of a regular n-gon are joined by an infinite line.at n=37A344899
• Number of polygon edges formed when every pair of vertices of a regular 2n-gon are joined by an infinite line.at n=18A347322