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%I #3 Jun 29 2008 03:00:00
%S 16,18,28,30,38,39,40,58,72,78,81,82,88,95,96,98,99,100,106,108,130,
%T 138,148,150,156,170,171,172,175,176,177,178,196,198
%N Numbers n such that nextprime(3*n)>3*nextprime(n) and n is composite (if p is prime then nextprime(p)=p).
%o (PARI) for(i=1,200,if(nextprime(3*i)>nextprime(3)*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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