|
|
A140468
|
|
Number of points at the n-th step of the following iteration, starting with four points in general position in the real projective plane: dualize the current pointset to a family of lines, take all intersections of those lines, repeat.
|
|
9
|
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
EXAMPLE
|
a(2)=6 because four points in general position define six lines.
|
|
CROSSREFS
|
|
|
KEYWORD
|
hard,more,nonn
|
|
AUTHOR
|
Joshua Cooper (cooper(AT)math.sc.edu), Jun 28 2008
|
|
STATUS
|
approved
|
|
|
|