Search: id:A079553
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%I A079553
%S A079553 1,1,1,1,1,2,1,1,1,2,1,2,1,2,2,1,1,2,1,2,2,2,1,2,1,2,1,2,1,3,1,1,2,2,2,
%T A079553 2,1,2,2,2,1,3,1,2,2,2,1,2,1,2,2,2,1,2,2,2,2,2,1,3,1,2,2,1,2,3,1,2,2,3,
%U A079553 1,2,1,2,2,2,2,3,1,2,1,2,1,3,2,2,2,2,1,3,2,2,2,2,2,2,1,2,2,2,1,3,1,2,3
%N A079553 Floor( d(n^2) / d(n) ), where d() = A000005.
%C A079553 This sequence and A087802 first differ at term 144: a(144)=3 and A087802(144)=2. 
               This sequence and A064372 first differ at term 64: a(64)=1 and A064372(64)=2. 
               The next difference doesn't appear until a(144)=3 and A064372(144)=2. 
               - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Mar 07 2004
%C A079553 Differs from A001221 at n=1, 144, 180, 210, 216 etc. [From R. J. Mathar 
               (mathar(AT)strw.leidenuniv.nl), Sep 19 2008]
%D A079553 D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 41.
%o A079553 (PARI) A079553(n)=floor(numdiv(n^2)/numdiv(n))
%Y A079553 Sequence in context: A062893 A158210 A087802 this_sequence A001221 A064372 
               A096825
%Y A079553 Adjacent sequences: A079550 A079551 A079552 this_sequence A079554 A079555 
               A079556
%K A079553 nonn
%O A079553 1,6
%A A079553 N. J. A. Sloane (njas(AT)research.att.com), Jan 24 2003

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