id:A060211 - OEIS Search Results

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Larger term of a pair of twin primes such that prime factors of their average are only 2 and 3. Proper subset of A053383.

+0
3

7, 13, 19, 73, 109, 193, 433, 1153, 2593, 139969, 472393, 786433, 995329, 57395629, 63700993, 169869313, 4076863489, 10871635969, 2348273369089, 56358560858113, 79164837199873, 84537841287169, 150289495621633 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`Primes such that p+p-2=2p-2=(2^u)*(3^w)`
	EXAMPLE	`a(4)=73, {71,73} are twin primes and (71+73)/2=72=2.2.2.3.3.`
	CROSSREFS	`A001454, A002822, A033845, A058383, A059960, A059961.` `Sequence in context: A024732 A024954 A070850 this_sequence A133029 A023984 A155212` `Adjacent sequences: A060208 A060209 A060210 this_sequence A060212 A060213 A060214`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Mar 20 2001`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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