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%I #8 Jan 17 2020 03:29:36
%S 2,3,7,5,6,7,15,17,10,11,23,13,14,15,31,17,35,19,39,21,22,23,47,73,26,
%T 53,55,29,30,31,94,33,34,35,71,37,38,39,79,41,42,43,87,89,46,47,95,97,
%U 197,51,103,53,107,55,111,57,58,59,119,61,62,187,127,65,66
%N Smallest squarefree number of the form n*k + 1.
%H Andrew Howroyd, <a href="/A076986/b076986.txt">Table of n, a(n) for n = 1..1000</a>
%e a(24) = 73 as 25 and 49 are not squarefree.
%o (PARI) a(n)={my(k=1); while(!issquarefree(n*k+1), k++); n*k+1} \\ _Andrew Howroyd_, Jan 16 2020
%Y Cf. A005117 (squarefree numbers).
%K easy,nonn
%O 1,1
%A _Amarnath Murthy_, Oct 25 2002
%E a(26) corrected and a(27) and beyond from _Andrew Howroyd_, Jan 16 2020
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