id:A067099 - OEIS Search Results

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Floor[radius of the circumscribed circle of a regular n-gon with unit sides].

+0
7

0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11 (list; graph; listen)

	OFFSET	`3,11`
	FORMULA	`a(n) = floor[1/{2*sin(pi/n)}]`
	EXAMPLE	`a(15) = floor [1/(2*sin(pi/15)) ] = [2.40486717237206534804886845877139] =2.`
	MATHEMATICA	`Table[ Floor[ 1/(2*Sin[Pi/n])], {n, 3, 75} ]`
	CROSSREFS	`Cf. A067100.` `Sequence in context: A111854 A132085 A111654 this_sequence A098429 A132090 A071538` `Adjacent sequences: A067096 A067097 A067098 this_sequence A067100 A067101 A067102`
	KEYWORD	`easy,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jan 07 2002`
	EXTENSIONS	`More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 09 2002`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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