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A071822 Largest prime factor of n is of the form 4k+3. 0

%I

%S 3,6,7,9,11,12,14,18,19,21,22,23,24,27,28,31,33,35,36,38,42,43,44,46,

%T 47,48,49,54,55,56,57,59,62,63,66,67,69,70,71,72,76,77,79,81,83,84,86,

%U 88,92,93,94,95,96,98,99,103,105,107,108,110,112,114,115,118,121,124

%N Largest prime factor of n is of the form 4k+3.

%F n such that A006530(n) == 3 mod(4)

%o (PARI) for(n=2,200,if((component(component(factor(n),1),omega(n))-3)%4==0,print1(n,",")))

%K easy,nonn

%O 1,1

%A _Benoit Cloitre_, Jun 07 2002

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Last modified April 18 22:08 EDT 2019. Contains 322237 sequences. (Running on oeis4.)