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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

%I

%S 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,

%T 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,

%U 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

%N Among any n lines on the plane, there exists a pair at an angle not more than a(n)degrees.

%F a(n)=Ceiling[180/n] for n>1.

%K nonn

%O 2,1

%A _Srikanth K S_, Jun 20 2009

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