id:A134030 - OEIS Search Results

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Areas of regular n-sided polygons with length of each side equal to 1 (rounded).

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1, 2, 3, 4, 5, 6, 8, 9, 11, 13, 15, 18, 20, 23, 26, 28, 32 (list; graph; listen)

	OFFSET	`4,2`
	LINKS	`Wikipedia, Regular polygons`
	FORMULA	`Round( n / 4 tan (180/n) )`
	EXAMPLE	`a(5) = 5 because a(1) is a square and a(5) is a regular octagon with sides equal to 1 which has a rounded area of 5.`
	CROSSREFS	`Sequence in context: A049808 A050418 A011869 this_sequence A100054 A101271 A093110` `Adjacent sequences: A134027 A134028 A134029 this_sequence A134031 A134032 A134033`
	KEYWORD	`easy,nonn`
	AUTHOR	`Ben Thurston (benthurston27(AT)yahoo.com), Jan 11 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.