A065887 - OEIS

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A065887

Smallest number whose square is divisible by n!.

1, 2, 6, 12, 60, 60, 420, 1680, 5040, 5040, 55440, 332640, 4324320, 8648640, 43243200, 172972800, 2940537600, 8821612800, 167610643200, 335221286400, 7039647014400, 14079294028800, 323823762662400, 647647525324800 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`a(n) = A019554(A000142(n)) = sqrt(A065887(n)) = A000142(n)/A055772(n)`
	EXAMPLE	`a(10) = 5040 since 10! = 3628800 and the smallest square divisible by this is 25401600 = 3628800*7 = 5040^2`
	CROSSREFS	`Sequence in context: A058312 A003418 A109935 * A072181 A126915 A002201` `Adjacent sequences: A065884 A065885 A065886 * A065888 A065889 A065890`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Nov 27 2001`

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Last modified February 16 14:37 EST 2012. Contains 205930 sequences.