Search: id:A057653
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%I A057653
%S A057653 1,5,9,13,17,25,29,37,41,45,49,53,61,65,73,81,85,89,97,101,109,113,117,
%T A057653 121,125,137,145,149,153,157,169,173,181,185,193,197,205,221,225,229,
%U A057653 233,241,245,257,261,265,269,277,281,289,293,305,313,317,325,333,337
%N A057653 Odd numbers of form x^2+y^2.
%H A057653 J. H. Conway, E. M. Rains and N. J. A. Sloane, On the existence of similar 
               sublattices, Canad. J. Math. 51 (1999), 1300-1306 (<a href="http:/
               /www.research.att.com/~njas/doc/sim.txt">Abstract</a>, <a href="http:/
               /www.research.att.com/~njas/doc/sim.pdf">pdf</a>, <a href="http:/
               /www.research.att.com/~njas/doc/sim.ps">ps</a>).
%F A057653 n = odd square * {product of distinct primes == 1 (mod 4)}.
%p A057653 readlib(issqr): for n from 1 to 1001 by 2 do for k from 0 to floor(sqrt(n)) 
               do if issqr(n-k^2) then printf(`%d,`,n); break fi; od:od:
%Y A057653 Odd members of A001481.
%Y A057653 Sequence in context: A004958 A088346 A098109 this_sequence A085759 A032493 
               A125018
%Y A057653 Adjacent sequences: A057650 A057651 A057652 this_sequence A057654 A057655 
               A057656
%K A057653 nonn
%O A057653 0,2
%A A057653 N. J. A. Sloane (njas(AT)research.att.com), Oct 15 2000
%E A057653 More terms from James A. Sellers (sellersj(AT)math.psu.edu), Oct 16 2000

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