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A111038 First i such that GCD(prime(i)+1, prime(i+1)+1,...,prime(i+n)+1) > 2. +0
1
4, 15, 46, 90, 90, 90, 3875, 4165, 16591, 21355, 21355, 21355 (list; graph; listen)
OFFSET

1,1

EXAMPLE

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.

CROSSREFS

Sequence in context: A062827 A074448 A152116 this_sequence A100506 A093967 A052201

Adjacent sequences: A111035 A111036 A111037 this_sequence A111039 A111040 A111041

KEYWORD

nonn

AUTHOR

Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Oct 05 2005

EXTENSIONS

a(8) to a(12) from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Oct 06 2005

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.


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