OFFSET
5,1
COMMENTS
A complete borderless polygon is one where each vertex is connected to every other vertex except for adjacent vertices. Adjacent vertices are not connected by edges. The result is a polygon interior.
FORMULA
a(n) = A007678(n) - n.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Stefan Hannie, May 25 2011
EXTENSIONS
a(8) onward corrected by T. D. Noe, Jun 02 2011
STATUS
approved