%I A086723
%S A086723 8,5,3,2,7,6,0,8,8,3,1,4,0,8,0,8,0,4,4,1,0,2,8,6,6,3,2,8,9,3,9,4,8,
%T A086723 5,9,4,3,6,8,9,7,7,1,2,8,6,1,3,7,2,3,7,1,1,9,0,0,4,7,7,3,4,5,4,2,4,
%U A086723 8,2,2,3,8,9,6,3,0,6,2,7,6,9,5,6,2,9,2,0,6,9,0,0,1,2,2,2,7,2,7,5,7
%N A086723 Decimal expansion of 1/(g(1)+g(2)-g(4)-g(5)), where g(k) = sum(1/(6*m+k)^2,
               m=0..infinity).
%D A086723 L. Fejes Toth, Lagerungen in der Ebene, auf der Kugel und im Raum, 2nd. 
               ed., Springer-Verlag, Berlin, Heidelberg 1972; see p. 213.
%e A086723 .85327608831408080...
%Y A086723 Cf. A086722-A086731.
%Y A086723 Sequence in context: A117035 A140133 A116397 this_sequence A011406 A011466 
               A154509
%Y A086723 Adjacent sequences: A086720 A086721 A086722 this_sequence A086724 A086725 
               A086726
%K A086723 nonn,cons
%O A086723 0,1
%A A086723 N. J. A. Sloane (njas(AT)research.att.com), Jul 31 2003