A085072 - OEIS

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A085072

Smallest k such that n and n+k have the same prime signature.

1, 2, 5, 2, 4, 4, 19, 16, 4, 2, 6, 4, 1, 6, 65, 2, 2, 4, 8, 1, 4, 6, 16, 24, 7, 98, 16, 2, 12, 6, 211, 1, 1, 3, 64, 4, 1, 7, 14, 2, 24, 4, 1, 5, 5, 6, 32, 72, 2, 4, 11, 6, 2, 2, 32, 1, 4, 2, 24, 6, 3, 5, 665, 4, 4, 4, 7, 5, 8, 2, 36, 6, 3, 1, 16, 5, 24, 4, 32, 544, 3, 6, 6, 1, 1, 4, 16, 8, 36, 2 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,2`
	EXAMPLE	`a(28) = 17 as 28 = 2^27 and 28+17 =45 = 3^25, both have the prime signature p^2*q where p and q are primes.`
	CROSSREFS	`Cf. A085073.` `Sequence in context: A085219 A197207 A197805 * A077200 A122581 A151871` `Adjacent sequences: A085069 A085070 A085071 * A085073 A085074 A085075`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 01 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jan 12 2005`

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.