id:A076638 - OEIS Search Results

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Denominators of harmonic numbers when the numerators are divisible by squares of primes >= 5 (cf. Wolstenholme's Theorem).

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12, 20, 2520, 27720, 720720, 4084080, 5173168, 80313433200, 2329089562800, 13127595717600, 485721041551200 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(1)=12 because the numerator of 25/12 is divisible by the square of 5; a(2)=20 because the numerator of 49/20 is divisible by the square of 7; etc.`
	CROSSREFS	`Cf. A076637.` `Sequence in context: A060159 A167351 A078600 this_sequence A129939 A082799 A089320` `Adjacent sequences: A076635 A076636 A076637 this_sequence A076639 A076640 A076641`
	KEYWORD	`nonn,frac`
	AUTHOR	`Michael Gilleland (megilleland(AT)yahoo.com), Oct 23 2002`

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Last modified November 21 21:21 EST 2009. Contains 167310 sequences.