Search: id:A075806
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%I A075806
%S A075806 1,2,2,4,55,35,30,20,30,10,31,60,31,40,20,10,51,40,20,61,40,11,40,81,
%T A075806 30,20,10,10,122,10,40,32,220,330,220,451,660,451,220,781,660,341,220,
%U A075806 110,220,110,11,220,220,440,451,220,110,110,110,451,220,220,220,341
%N A075806 Differences between adjacent palindromic numbers which are products of 
               an odd number of distinct primes.
%e A075806 a(1)=3-2=1, a(2)=5-3=2, a(5)=66-11=55.
%p A075806 test := proc(n) local d; d := convert(n,base,10); return ListTools[Reverse](d)=d 
               and numtheory[mobius](n)=-1; end; s := []; for n from 1 to 11000 
               do if test(n) then s := [op(s),n]; end; od; a := [op(2..-1,s)-op(1..-2,
               s)];
%Y A075806 Cf. A037010.
%Y A075806 Sequence in context: A032334 A032082 A088895 this_sequence A050923 A067700 
               A037010
%Y A075806 Adjacent sequences: A075803 A075804 A075805 this_sequence A075807 A075808 
               A075809
%K A075806 nonn,base
%O A075806 1,2
%A A075806 Jani Melik (jani_melik(AT)hotmail.com), Oct 13 2002
%E A075806 Edited by Dean Hickerson (dean.hickerson(AT)yahoo.com), Oct 21 2002

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