id:A105651 - OEIS Search Results

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Numbers n such that n + smallest prime factor of n + largest prime factor of n = next prime after n.

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24, 48, 54, 90, 120, 140, 144, 288, 300, 360, 384, 450, 480, 528, 648, 720, 900, 960, 972, 1080, 1386, 1400, 1440, 1584, 1672, 1728, 1792, 1848, 1936, 1944, 2304, 2430, 2450, 2700, 2880, 3230, 3584, 3600, 3840, 4180, 4320, 4500, 5184, 5400, 5544, 5940 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`24 + smallest prime factor of 24 + largest prime factor of 24 = 24 + 2 + 3 = 29 = next prime after 24. So 24 belongs to the sequence`
	MATHEMATICA	<< NumberTheory`NumberTheoryFunctions` Select[Range[2, 10^4], # + Last[Transpose[FactorInteger[ # ]][[1]]] + First[Transpose[FactorInteger[ # ]][[1]]] == NextPrime[ # ] &]
	CROSSREFS	`Adjacent sequences: A105648 A105649 A105650 this_sequence A105652 A105653 A105654` `Sequence in context: A028992 A040552 A098427 this_sequence A105779 A074698 A050497`
	KEYWORD	`nonn`
	AUTHOR	`Joseph L. Pe (joseph_l_pe(AT)hotmail.com), May 04 2005`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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