%I A006270 M3170
%S A006270 1,3,72,439128,84722519069640072,
%T A006270 608130213374088941214747405817720857404971722895128
%N A006270 Denominators of a continued fraction.
%D A006270 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006270 Shallit, Jeffrey; Predictable regular continued cotangent expansions. 
               J. Res. Nat. Bur. Standards Sect. B 80B (1976), no. 2, 285-290.
%Y A006270 Sequence in context: A071645 A156908 A135866 this_sequence A139888 A079594 
               A089922
%Y A006270 Adjacent sequences: A006267 A006268 A006269 this_sequence A006271 A006272 
               A006273
%K A006270 nonn
%O A006270 0,2
%A A006270 N. J. A. Sloane (njas(AT)research.att.com).