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A217750
Number of tetragonal regions in the exterior of a regular n-gon with all diagonals drawn.
1
0, 0, 0, 0, 0, 0, 18, 50, 88, 156, 260, 392, 555, 848, 1088
OFFSET
3,7
CROSSREFS
Sequence in context: A102835 A095990 A102836 * A180292 A143928 A356743
KEYWORD
nonn
AUTHOR
Martin Renner, Mar 23 2013
STATUS
approved