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A051332
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Euclid-Mullin sequence (A000945) with initial value a(1)=65537 instead of a(1)=2.
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1
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65537, 2, 5, 3, 7, 11, 61, 13, 120052642711, 157, 8837, 71, 3271, 31, 37, 19, 8597, 8868542017, 23, 149, 26443389827415776296437975011182059459845296976025400711, 97, 751, 17, 280121, 4999, 8797543, 12241, 29, 53, 197, 5659, 3109, 1063, 727915549
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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]=65537; 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) spf(n)=my(f=factor(n)[1, 1]); f \\ A020639
first(m)=my(v=vector(m)); v[1]=65537; for(i=2, m, v[i]=spf(1+prod(j=1, i-1, v[j]))); v \\ Anders Hellström, Dec 07 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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