id:A117101 - OEIS Search Results

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Numbers n such that nextprime(5*n)>5*nextprime(n) and n is composite (if p is prime then nextprime(p)=p).

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18, 28, 40, 60, 72, 78, 82, 96, 102, 105, 106, 155, 156, 166, 178, 180, 192, 222, 226, 228, 250, 262, 266, 267, 268, 270, 280, 282, 292 (list; graph; listen)

	OFFSET	`1,1`
	PROGRAM	`(PARI) for(i=1, 300, if(nextprime(5i)>nextprime(5)nextprime(i) && !isprime(i), print1(i, ", ")))`
	CROSSREFS	`Sequence in context: A128858 A141782 A161813 this_sequence A063840 A167333 A045000` `Adjacent sequences: A117098 A117099 A117100 this_sequence A117102 A117103 A117104`
	KEYWORD	`easy,nonn`
	AUTHOR	`Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Apr 18 2006`

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.

AT&T Labs Research