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A100688
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a(n) = prime(n) * 3^prime(n) - 1.
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0
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17, 80, 1214, 15308, 1948616, 20726198, 2195382770, 22082967872, 2165293113020, 1990280943581606, 19147875284802356, 16660504517966902430, 1495392851464002242522, 14115049597965094337960, 1249674274871002654525988, 1027312020387041054530226318
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(1) = 2*3^2 - 1 = 17.
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MATHEMATICA
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PROG
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(Magma) [NthPrime(n)*3^NthPrime(n) - 1: n in [1..20]]; // Vincenzo Librandi, Aug 27 2015
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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