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A131102 Prime numbers arising from A131101. 1

%I #7 Sep 24 2013 09:24:41

%S 2,5,7,11,23,47,37,59,41,43,47,83,107,73,83,89,97,167,179,227,139,137,

%T 151,263,151,167,157,197,347,193,359,223,383,229,241,467,479,257,293,

%U 503,281,307,283,307,317,563,313,313,587,331,349,349,367,367,419,719

%N Prime numbers arising from A131101.

%C The Safe Primes (A005385) are part of this sequence because they are the result of adding A005384(n) (Sophie Germain primes) to its only prime factor (itself) + 1 = 2*A005384 + 1 .

%F A131101(n) + prime factors of A131101(n) + 1 = a(n) ; a(n) is a prime number.

%e a(8)=59 because 59 = A131101(8)+ prime factors of A131101(8) +1 = 29+ (29) +1.

%e a(9)=41 because A131101(9)+ prime factors of A131101(8) + 1 = 30 +(2+3+5)+1.

%Y Cf. A131101, A005384, A005385.

%K easy,nonn

%O 1,1

%A _Tomas Xordan_, Jun 14 2007

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Last modified April 28 07:46 EDT 2024. Contains 372020 sequences. (Running on oeis4.)