%I
%S 2,3,4,6,7,9,12,13,18,21,22,30,33,46,48,57,58,61,66,67,75,79,85,87,90,
%T 94,96,99,100,106,111,114,117,118,120,121,127,129,133,138,144,153,160,
%U 162,171,174,175,186,187,195,199,202,204,220,222,223,231,243,246,252
%N Numbers k such that k^2*(k1)1 is prime.
%H Ivan Neretin, <a href="/A162293/b162293.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n)^2 * ( a(n)1 )1 = A162291(n).
%e a(1)=2 since 2^32^21=3 is prime.
%e a(2)=3 since 3^33^21=17 is prime.
%e a(3)=4 since 4^34^21=47 is prime.
%t lst={};Do[s=n^3n^2;If[PrimeQ[s1],AppendTo[lst,n]],{n,6!}];lst
%Y Cf. A087908, A162291 (corresponding k), A111501.
%K nonn
%O 1,1
%A _Vladimir Joseph Stephan Orlovsky_, Jun 30 2009
%E Comments moved to the examples by _R. J. Mathar_, Sep 11 2009
