A117101 - OEIS

A117101

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

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

1,1

LINKS

PROG

(PARI) for(i=1, 300, if(nextprime(5*i)>nextprime(5)*nextprime(i) && !isprime(i), print1(i, ", ")))

CROSSREFS

KEYWORD

easy,nonn

AUTHOR

Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Apr 18 2006

STATUS

approved