%I A002849 M0980 N0368
%S A002849 0,0,1,2,4,6,3,10,25,12,42,8,40,202,21
%N A002849 Number of solutions of x+y=z from {1, 2, ..., n}.
%D A002849 R. K. Guy, ``Sedlacek's Conjecture on Disjoint Solutions of x+y= z,'' 
               in Proc. Conf. Number Theory. Pullman, WA, 1971, pp. 221-223.
%D A002849 R. K. Guy, ``Packing [ 1,n ] with solutions of ax + by = cz; the unity 
               of combinatorics,'' in Colloq. Internaz. Teorie Combinatorie. Rome, 
               1973, Atti Conv. Lincei. Vol. 17, Part II, pp. 173-179, 1976.
%D A002849 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002849 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%Y A002849 Sequence in context: A064413 A122280 A057063 this_sequence A163234 A072984 
               A018841
%Y A002849 Adjacent sequences: A002846 A002847 A002848 this_sequence A002850 A002851 
               A002852
%K A002849 nonn
%O A002849 1,4
%A A002849 N. J. A. Sloane (njas(AT)research.att.com).