Search: id:A126635
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%I A126635
%S A126635 7,47,307,1943,11827,69287,392707,2166743,11703187,62168327,325983907,
%T A126635 1692105143,8714154547,44600020967,227161443907,1152585909143,
%U A126635 5830444893907,29423488811207,148206112628707,745396075770743
%N A126635 a(n) is the number of nonnegative integers k less than 10^n such that 
               the decimal representation of k lacks the digits 1,2,3, at least 
               one of digits 4,5 and at least one of digits 6,7,8,9.
%H A126635 Milan Janjic, <a href="http://www.pmfbl.org/janjic/">Enumerative Formulas 
               for Some Functions on Finite Sets</a>
%F A126635 a(n)=8*5^n-16*4^n+14*3^n-6*2^n+1
%e A126635 a(8)=2166743
%p A126635 f:=n->8*5^n-16*4^n+14*3^n-6*2^n+1;
%Y A126635 Cf. A125630, A125948, A125947, A125946, A125945, A125910, A125909, A125908, 
               A125880, A125897, A125904, A125858.
%Y A126635 Sequence in context: A091516 A064385 A009260 this_sequence A085352 A125370 
               A163346
%Y A126635 Adjacent sequences: A126632 A126633 A126634 this_sequence A126636 A126637 
               A126638
%K A126635 nonn
%O A126635 1,1
%A A126635 Aleksandar M. Janjic and Milan R. Janjic (agnus(AT)blic.net), Feb 08 
               2007

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