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A241191
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Numerator of Sum_{i=1..n} 1/(prime(i)*prime(i+1)*prime(i+2)).
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5
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1, 3, 1, 93, 145, 213, 289, 365, 260511, 9645025, 395623447, 17017308303, 800016993275, 902324346127, 2502504187659113, 152669617912106167, 10229758110750827711, 726365554791051924279, 53027901964339123037045, 57389311757677767147397
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OFFSET
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1,2
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LINKS
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EXAMPLE
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1/30, 3/70, 1/22, 93/2002, 145/3094, 213/4522, 289/6118, 365/7714, 260511/5500082, 9645025/203503034, 395623447/8343624394, 17017308303/358775848942, 800016993275/16862464900274, 902324346127/19015119993926, ...
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MAPLE
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g:= n-> add(1/(ithprime(i)*ithprime(i+1)*ithprime(i+2)), i=1..n);
t1:=[seq(g(n), n=1..20)];
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CROSSREFS
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KEYWORD
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nonn,frac
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AUTHOR
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STATUS
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approved
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