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A117100 Numbers n such that nextprime(3*n)>3*nextprime(n) and n is composite (if p is prime then nextprime(p)=p). 0
16, 18, 28, 30, 38, 39, 40, 58, 72, 78, 81, 82, 88, 95, 96, 98, 99, 100, 106, 108, 130, 138, 148, 150, 156, 170, 171, 172, 175, 176, 177, 178, 196, 198 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..34.

PROG

(PARI) for(i=1, 200, if(nextprime(3*i)>nextprime(3)*nextprime(i) && !isprime(i), print1(i, ", ")))

CROSSREFS

Sequence in context: A160778 A057369 A178110 * A101848 A032401 A335223

Adjacent sequences:  A117097 A117098 A117099 * A117101 A117102 A117103

KEYWORD

easy,nonn

AUTHOR

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

STATUS

approved

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Last modified May 28 05:31 EDT 2022. Contains 354112 sequences. (Running on oeis4.)