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Search: id:A102747
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| A102747 |
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Primes p(n) such that p(n)#+p(n+1) is divisible by p(n+2). |
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+0
1
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OFFSET
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1,1
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EXAMPLE
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7 belongs to this sequence since 2*3*5*7+11 is divisible by 13.
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PROGRAM
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(PARI) { isgood(p) = local(r, p2, p3); p2=nextprime(p+1); p3=nextprime(p2+1); r=Mod(1, p3); forprime(q=1, p, r*=q); r+=p2; return(r==0); }
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CROSSREFS
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Cf. A002110, A058233.
Sequence in context: A087589 A002812 A102598 this_sequence A122524 A162634 A072664
Adjacent sequences: A102744 A102745 A102746 this_sequence A102748 A102749 A102750
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KEYWORD
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hard,more,nonn
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AUTHOR
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Max Alekseyev (maxale(AT)gmail.com), Feb 09 2005
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EXTENSIONS
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863833 from Ryan Propper (rpropper(AT)cs.stanford.edu), Jan 07 2008
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