id:A085072 - OEIS Search Results

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

+0
3

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; listen)

	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: A161643 A085220 A085219 this_sequence A077200 A122581 A151871` `Adjacent sequences: A085069 A085070 A085071 this_sequence 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 December 18 21:37 EST 2009. Contains 171024 sequences.

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