%I
%S 1,3,2,6,5,4,11,10,8,7,18,17,14,13,9,29,28,23,21,15,12,42,41,35,33,25,
%T 20,16,61,60,51,48,37,32,26,19,86,85,71,68,54,46,38,31,22
%N Interspersion of the Farey fractal sequence, A131967.
%C A permutation of the natural numbers.
%D C. Kimberling, "Fractal sequences and interspersions," Ars Combinatoria 45 (1997) 157168.
%F Rectangular array T given by antidiagonals. T(i,j) = the jth index n such that A131967(n)=i.
%e Northwest corner:
%e 1 3 6 11 18
%e 2 5 10 17 28
%e 4 8 14 23 35
%e 7 13 21 33 48
%Y Cf. A131967.
%K nonn,tabl
%O 1,2
%A _Clark Kimberling_, Aug 02 2007
