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A117101
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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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0
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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
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OFFSET
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1,1
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LINKS
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PROG
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(PARI) for(i=1, 300, if(nextprime(5*i)>nextprime(5)*nextprime(i) && !isprime(i), print1(i, ", ")))
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Apr 18 2006
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STATUS
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approved
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