A217750 Number of tetragonal regions in the exterior of a regular n-gon with all diagonals drawn.

0, 0, 0, 0, 0, 0, 18, 50, 88, 156, 260, 392, 555, 848, 1088

Offset

3,7

Links

Table of n, a(n) for n=3..17.

Crossrefs

Cf. A067151, A217746.

Sequence in context: A102835 A095990 A102836 * A180292 A143928 A356743

Adjacent sequences: A217747 A217748 A217749 * A217751 A217752 A217753

Keyword

nonn

Author

Martin Renner, Mar 23 2013

Status

approved