%I A097045
%S A097045 1,0,1,1,1,1,1,1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,
               21,22,23,
%T A097045 24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,
               47,48,49,50,51,
%U A097045 52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,71,71,71,
               71,71,71,71,71
%V A097045 1,0,-1,-1,-1,-1,-1,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,
               19,20,21,22,23,
%W A097045 24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,
               47,48,49,50,51,
%X A097045 52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,71,71,71,
               71,71,71,71,71
%N A097045 a(n) = a(n-1) - a(floor(sqrt(n))) for n > 1; a(1) = 1.
%F A097045 a(1)=1; a(n) = a(n-1) - a(floor(sqrt(n))) for n > 1.
%Y A097045 Cf. A097046 ( a(n-1) + a(floor(sqrt(n))) ).
%Y A097045 Sequence in context: A088480 A061019 A028310 this_sequence A118759 A118760 
               A130446
%Y A097045 Adjacent sequences: A097042 A097043 A097044 this_sequence A097046 A097047 
               A097048
%K A097045 sign
%O A097045 1,11
%A A097045 Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jul 20 2004