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A051327
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Euclid-Mullin sequence (A000945) with initial value a(1)=83 instead of a(1)=2.
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1
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83, 2, 167, 3, 7, 67, 5, 13, 719, 37, 11, 31, 1367, 31440216015620321911, 988487183108868589955299792587646370011, 19, 499, 937, 23, 29, 863, 1852812869, 1157393039341097158113740816072403984079, 445807, 13833892959043, 359, 109, 331
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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a[1]=83; a[n_] := First[ Flatten[ FactorInteger[ 1+Product[ a[ j ], {j, 1, n-1} ] ] ] ]; Array[a, 10]
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PROG
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(PARI) gpf(n)=my(f=factor(n)[, 1]); f[#f];
first(m)=my(v=vector(m)); v[1]=83; for(i=2, m, v[i]=gpf(1+prod(j=1, i-1, v[j]))); v \\ Anders Hellström, Nov 25 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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