Search: id:A071374
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%I A071374
%S A071374 1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,0,1,1,0,1,
%T A071374 1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,0,1,1,0,1,1,
%U A071374 1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,0,1,1,0,1,1,1
%N A071374 0 iff n is of the form 4^a*(8k+7).
%C A071374 0 iff n is not the sum of three squares.
%C A071374 Sequence is 2-automatic.
%D A071374 J.-P. Allouche and J. Shallit, The ring of k-regular sequences, Theoretical 
               Computer Sci., 98 (1992), 163-197.
%H A071374 J.-P. Allouche and J. Shallit, <a href="http://www.cs.uwaterloo.ca/~shallit/
               Papers/as0.ps">The ring of k-regular sequences</a>, Theoretical Computer 
               Sci., 98 (1992), 163-197.
%Y A071374 1's complement to A072401. Cf. A071377.
%Y A071374 Sequence in context: A115789 A053864 A129667 this_sequence A077010 A166280 
               A070887
%Y A071374 Adjacent sequences: A071371 A071372 A071373 this_sequence A071375 A071376 
               A071377
%K A071374 nonn
%O A071374 0,1
%A A071374 N. J. A. Sloane (njas(AT)research.att.com), Jun 12 2002

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