A147752 - OEIS

This site is supported by donations to The OEIS Foundation.

A147752

Size of the largest subset of {1,2,3,...,n} whose geometric mean is an integer.

0, 0, 0, 3, 3, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 5, 5, 7, 7, 7 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	EXAMPLE	`For n=4, (14)^(1/2)=2 and (12*4)^(1/3)=2. No other subset of {1,2,3,4} has integer geometric mean, so a(4)=3.`
	CROSSREFS	`A147751, A147753` `Sequence in context: A105159 A176873 A050499 * A114227 A187469 A112593` `Adjacent sequences: A147749 A147750 A147751 * A147753 A147754 A147755`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Nov 11 2008`

Content is available under The OEIS End-User License Agreement .

Last modified February 14 13:08 EST 2012. Contains 205623 sequences.