id:A117100 - OEIS Search Results

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Numbers n such that nextprime(3*n)>3*nextprime(n) and n is composite (if p is prime then nextprime(p)=p).

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16, 18, 28, 30, 38, 39, 40, 58, 72, 78, 81, 82, 88, 95, 96, 98, 99, 100, 106, 108, 130, 138, 148, 150, 156, 170, 171, 172, 175, 176, 177, 178, 196, 198 (list; graph; listen)

	OFFSET	`1,1`
	PROGRAM	`(PARI) for(i=1, 200, if(nextprime(3i)>nextprime(3)nextprime(i) && !isprime(i), print1(i, ", ")))`
	CROSSREFS	`Sequence in context: A097746 A081258 A057369 this_sequence A101848 A032401 A070574` `Adjacent sequences: A117097 A117098 A117099 this_sequence A117101 A117102 A117103`
	KEYWORD	`easy,nonn`
	AUTHOR	`Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Apr 18 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

AT&T Labs Research