cp's OEIS Frontend

A232009 a(n) = the smallest squarefree number (from A005117) of the form p*q with prime factors in a p^2 + n progression, or 0 if no such number exists.

%I A232009 #10 Nov 23 2013 23:45:57
%S A232009 10,33,14,39,0,155,22,51,26,57,0,185,34,69,38,205,0,215,46,87,0,93,0,
%T A232009 511,58,0,62,111,0,553,0,123,74,129,0,305,82,141,86,623,0,335,94,159,
%U A232009 0,355,0,365,106,177,0,183,0,395,118,0,122,201,0,763,0,213,134
%N A232009 a(n) = the smallest squarefree number (from A005117) of the form p*q with prime factors in a p^2 + n progression, or 0 if no such number exists.
%C A232009 a(n) = the smallest squarefree number m of the form p*q with prime factors p and q = p^2 + n, or 0 if no such number exists; m = p^3 + p*n.
%C A232009 a(n) = 0 for numbers n from A232010.
%F A232009 a(4) = 39 because 39 = 3 * 13 = 3 * (3^2 + 4).
%Y A232009 Cf. A005117, A232010, A067775, A232012, A023200.
%K A232009 nonn
%O A232009 1,1
%A A232009 _Jaroslav Krizek_, Nov 20 2013