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A047975
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Let (p1,p2), (p3,p4) be two pairs of successive primes such that p1*p2=p3+p4-1, |p2-p1|=|p4-p3|; sequence gives |p2-p1|=|p4-p3|.
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0
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2, 4, 2, 4, 6, 6, 4, 2, 4, 4, 2, 6, 4, 6, 4, 4, 6, 4, 2, 2, 4, 2, 4, 6, 6, 10, 8, 4, 4, 4, 2, 4, 4, 2, 6, 6, 4, 2, 8, 6, 12, 2, 2, 8, 10, 2, 12, 6, 4, 4, 14, 2, 18, 16, 6, 10, 4, 8, 4, 2, 8, 12, 2, 8, 12, 10, 6, 2, 6
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OFFSET
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0,1
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LINKS
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EXAMPLE
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E.g 5*7=17+19-1,(7-5=19-17=2); 7*11=37+41-1,(11-7=41-37=4); 11*13=71+73-1,(13-11=73-71=2); 13*17=109+113-1,(17-13=113-109=4);...
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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