id:A085073 - OEIS Search Results

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Smallest k such that n+k and nk have the same prime signature, or 0 if no such number exists.

+0
2

2, 1, 7, 41, 15, 134, 3, 127, 11, 2, 3, 548, 2, 1, 3, 389, 5, 582, 2, 316, 1, 38, 3, 2216, 3, 2, 13, 212, 5, 2742, 2, 1669, 1, 1, 31, 2764, 2, 1, 13, 1094, 4, 2298, 3, 1, 123, 14, 11, 8912, 3, 202, 17, 2, 2, 1146, 23, 904, 1, 26, 3, 11028, 13, 22, 57, 3581, 37, 1194, 2, 172, 15 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(6) = 379 as 6379 = 23379 and 6+379 = 385 = 5711 both have prime signature pq*r.`
	CROSSREFS	`Cf. A085072.` `Sequence in context: A009281 A141516 A138346 this_sequence A131288 A111789 A021825` `Adjacent sequences: A085070 A085071 A085072 this_sequence A085074 A085075 A085076`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 01 2003`
	EXTENSIONS	`Corrected by Jason Earls (zevi_35711(AT)yahoo.com), Jul 10 2003` `More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jan 12 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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