Search: id:A046328
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%I A046328
%S A046328 4,6,9,22,33,55,77,111,121,141,161,202,262,303,323,393,454,505,515,535,
%T A046328 545,565,626,707,717,737,767,818,838,878,898,939,949,959,979,989,1111,
%U A046328 1441,1661,1991,3113,3223,3443,3883,7117,7447,7997,9119,9229,9449,10001
%N A046328 Palindromes with exactly 2 prime factors (counted with multiplicity).
%e A046328 E.g. 111 is a palindrome and 111 = 3*37. 3 and 37 are primes.
%t A046328 fQ[n_] := Block[{id = IntegerDigits[n]}, Plus @@ Last /@ FactorInteger[n] 
               == 2 && id == Reverse[id]]; Select[ Range[ 10000], fQ[ # ] &] (from 
               Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 06 2005)
%Y A046328 Cf. A001358, A046315, A046408, A108505.
%Y A046328 Sequence in context: A046338 A118690 A084994 this_sequence A046376 A085721 
               A081614
%Y A046328 Adjacent sequences: A046325 A046326 A046327 this_sequence A046329 A046330 
               A046331
%K A046328 nonn,base
%O A046328 1,1
%A A046328 Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1998.

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