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If n is a perfect fourth power, then replace it with the fourth root of n.
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%I #6 Sep 01 2015 16:56:39

%S 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,2,17,18,19,20,21,22,23,24,25,26,

%T 27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,

%U 50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,3,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99

%N If n is a perfect fourth power, then replace it with the fourth root of n.

%o (PARI) a(n)=ispower(n,4,&n); n \\ _Charles R Greathouse IV_, Sep 01 2015

%Y Cf. A097448, A097449.

%K nonn,easy

%O 1,2

%A _V. Raman_, Sep 07 2012