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A153445 Take n points in general position in space; draw all planes through all triples of these points; sequence gives number of connected regions formed. 0
2, 15, 86, 634, 3956, 18549, 69065 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..9.

FORMULA

a(n)=1+(n^9-9n^8+6n^7+180n^6-663n^5+369n^4+3536n^3-8964n^2+2952n)/1296

CROSSREFS

Cf. A055503

Sequence in context: A108475 A098624 A116079 * A208974 A294196 A275794

Adjacent sequences:  A153442 A153443 A153444 * A153446 A153447 A153448

KEYWORD

nonn

AUTHOR

Alexander Evnin, Dec 26 2008

STATUS

approved

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Last modified November 18 13:22 EST 2018. Contains 317306 sequences. (Running on oeis4.)