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A143181
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Sequence of a(n) such that : define p(0)=2 the first prime, then p(n+1)=least prime p of the form a(n)*p(n)*(a(n)*p(n)+1)-1 with a twin prime p+2.
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1
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OFFSET
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1,3
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LINKS
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EXAMPLE
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1*2*(1*2+1)-1=5, 7 twin prime so a(1)=1
1*5*(1*5+1)-1=29, 31 twin prime so a(2)=1
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CROSSREFS
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KEYWORD
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more,nonn
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AUTHOR
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STATUS
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approved
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