5,1

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.

Table of n, a(n) for n=5..41.

a(n) = A007678(n) - n.

Cf. A007678.

Sequence in context: A068293 A272250 A272700 * A184630 A009957 A011929

Adjacent sequences: A191098 A191099 A191100 * A191102 A191103 A191104

nonn,easy

Stefan Hannie, May 25 2011

a(8) onward corrected by T. D. Noe, Jun 02 2011

approved