Search: id:A061987
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%I A061987
%S A061987 1,1,1,1,2,2,1,3,4,2,6,3,5,4,12,6,10,8,9,15,12,20,16,18,30,24,27,13,32,
%T A061987 36,60,48,54,26,64,72,81,39,96,108,52,128,144,162,78,192,216,104,139,
%U A061987 117,288,324,156,384,432,208,278,234,576,648,312,417,351,864,416,556
%N A061987 Number of times n-th distinct value is repeated in sequence b(k) = 1 
               + b([k/2]) + b([k/3]) with b(0) = 0 i.e. in A061984; also number 
               of times n-th distinct row is repeated in square array T(n,k) = T(n-1,
               k) + T(n-1,[k/2]) + T(n-1,[k/3]) with T(0,0) = 1 i.e. in A061980.
%C A061987 For n>0: a(n)=A003586(n+1)-A003586(n) and a(A084791(n))=A084788(n).
%C A061987 Also number of times A160519(n+1) is repeated in A088468. [From Reinhard 
               Zumkeller (reinhard.zumkeller(AT)gmail.com), May 16 2009]
%H A061987 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               SmoothNumber.html">Smooth Number</a>
%F A061987 a(n)=A061986(A061985(n)).
%Y A061987 Sequence in context: A080242 A035317 A103923 this_sequence A105809 A091594 
               A118032
%Y A061987 Adjacent sequences: A061984 A061985 A061986 this_sequence A061988 A061989 
               A061990
%K A061987 nonn
%O A061987 0,5
%A A061987 Henry Bottomley (se16(AT)btinternet.com), May 24 2001
%E A061987 More terms from Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), 
               Jun 03 2003

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