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A161823
Among any n lines on the plane, there exists a pair at an angle not more than a(n) degrees.
0
90, 60, 45, 36, 30, 26, 23, 20, 18, 17, 15, 14, 13, 12, 12, 11, 10, 10, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2
OFFSET
2,1
FORMULA
a(n) = ceiling(180/n) for n > 1.
CROSSREFS
Sequence in context: A332427 A033410 A008901 * A270173 A003899 A271233
KEYWORD
nonn
AUTHOR
Srikanth K S, Jun 20 2009
STATUS
approved