%I
%S 2,3,5,11,13,17,19,23,29,31,37,47,53,59,61,67,71,73,79,83,89,97,101,
%T 103,109,113,127,131,137,139,149,151,163,167,173,179,181,191,197,199,
%U 211,223,227,229,233,241,263,269,271,277,281,283,311,313,317,331,337
%N Primes p such that p^2 + 1 is squarefree.
%C Primes of the sequence A224718 generating squarefree.
%H Amiram Eldar, <a href="/A225856/b225856.txt">Table of n, a(n) for n = 1..10000</a>
%e 23 is a term since 23^2+1 = 530 = 2*5*53, is squarefree.
%e 43 is not a term since 43^2+1 = 1850 = 2*5^2*7, is not squarefree.
%t Select[Prime[Range[100]], SquareFreeQ[#^2+1]&]
%Y Intersection of A000040 and A049533.
%Y Cf. A224718.
%K nonn
%O 1,1
%A _Rafael Parra Machio_, May 18 2013
