%I A002667 M3171 N1286
%S A002667 3,73,8599,400091364,371853741549033970,
%T A002667 253461181173408820488703379557217678
%N A002667 Continued cotangent for Pi.
%D A002667 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A002667 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002667 D. H. Lehmer, A cotangent analogue of continued fractions, Duke Math. 
               J., 4 (1935), 323-340.
%H A002667 Harry J. Smith, <a href="b002667.txt">Table of n, a(n) for n=0,...,9</
               a>
%H A002667 <a href="Sindx_Ph.html#Pi314">Index entries for sequences related to 
               the number Pi</a>
%o A002667 (PARI) { default(realprecision, 10000); bn=vector(10); bn[1]=Pi; for(n=2, 
               10, bn[n]=(bn[n-1]*floor(bn[n-1]) + 1)/(bn[n-1] - floor(bn[n-1]))); 
               for (n=1, 10, write("b002667.txt", n-1, " ", floor(bn[n]))); } [From 
               Harry J. Smith (hjsmithh(AT)sbcglobal.net), May 04 2009]
%Y A002667 Sequence in context: A012810 A020517 A119017 this_sequence A145675 A162601 
               A093183
%Y A002667 Adjacent sequences: A002664 A002665 A002666 this_sequence A002668 A002669 
               A002670
%K A002667 nonn
%O A002667 0,1
%A A002667 N. J. A. Sloane (njas(AT)research.att.com).
%E A002667 More terms from J. O. Shallit.