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Search: id:A111038
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| A111038 |
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First i such that GCD(prime(i)+1, prime(i+1)+1,...,prime(i+n)+1) > 2. |
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+0 1
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| 4, 15, 46, 90, 90, 90, 3875, 4165, 16591, 21355, 21355, 21355
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OFFSET
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1,1
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EXAMPLE
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The first i such that GCD(prime(i)+1, prime(i+1)+1, prime(i+2)+1)) > 2 is i = 15. So a(2) = 15.
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CROSSREFS
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Sequence in context: A062827 A074448 A152116 this_sequence A100506 A093967 A052201
Adjacent sequences: A111035 A111036 A111037 this_sequence A111039 A111040 A111041
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KEYWORD
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nonn
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Oct 05 2005
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EXTENSIONS
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a(8) to a(12) from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Oct 06 2005
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