0,2

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Shallit, Jeffrey; Predictable regular continued cotangent expansions. J. Res. Nat. Bur. Standards Sect. B 80B (1976), no. 2, 285-290.

Sequence in context: A071645 A156908 A135866 this_sequence A139888 A079594 A089922

Adjacent sequences: A006267 A006268 A006269 this_sequence A006271 A006272 A006273

nonn

N. J. A. Sloane (njas(AT)research.att.com).