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%I #5 Mar 31 2017 22:30:50
%S 1,5,6,7,11,8,13,17,16,9,15,20,19,23,28,27,21,10,17,23,22,27,33,32,25,
%T 29,40,45,39,38,43,37,26,11,19,26,25,31,38,37,29,34,47,53,46,45,51,44,
%U 31,35,52,63,57,62,73,67,50,49,65,70,59,53,58,47,31,12,21,29
%N Replace each fraction p/q in Farey tree A007305/A007306 with 4p+q.
%D J. C. Lagarias, Number Theory and Dynamical Systems, pp. 35-72 of S. A. Burr, ed., The Unreasonable Effectiveness of Number Theory, Proc. Sympos. Appl. Math., 46 (1992). Amer. Math. Soc.
%F Equals 4*A007305+A007306.
%K nonn,easy,tabf
%O 0,2
%A _Gregory V. Richardson_