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Powerful(1) numbers (A001694) whose digit reversal is a prime number.
1

%I #5 Mar 30 2012 17:40:35

%S 16,32,125,128,196,200,361,392,500,784,1024,1352,1369,1372,1444,1600,

%T 1681,2000,3200,3844,5000,7225,7688,7921,9025,9248,9409,9800,10976,

%U 11236,12500,12800,13448,14161,14792,16000,18496,19321,19600,20000

%N Powerful(1) numbers (A001694) whose digit reversal is a prime number.

%H <a href="/index/Pow#powerful">Index entries for sequences related to powerful numbers</a>

%e 7688=2^3*31^2 is powerful and 8867 is prime.

%Y Cf. A001694.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Jan 31 2006