A161823 Among any n lines on the plane, there exists a pair at an angle not more than a(n) degrees.

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

Links

Table of n, a(n) for n=2..97.

Formula

a(n) = ceiling(180/n) for n > 1.

Crossrefs

Sequence in context: A332427 A033410 A008901 * A270173 A003899 A271233

Adjacent sequences: A161820 A161821 A161822 * A161824 A161825 A161826

Keyword

nonn

Author

Srikanth K S, Jun 20 2009

Status

approved