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%I #3 Jun 29 2008 03:00:00
%S 18,28,40,60,72,78,82,96,102,105,106,155,156,166,178,180,192,222,226,
%T 228,250,262,266,267,268,270,280,282,292
%N Numbers n such that nextprime(5*n)>5*nextprime(n) and n is composite (if p is prime then nextprime(p)=p).
%o (PARI) for(i=1,300,if(nextprime(5*i)>nextprime(5)*nextprime(i) && !isprime(i),print1(i,",")))
%K easy,nonn
%O 1,1
%A Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Apr 18 2006
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