%I A005469 M1398
%S A005469 2,5,11,26,56,122,287,677,1457,3137,6833,14885,35015,82370,194300,
%T A005469 458330,986390,2122850,4570610,9840770,21435122,46689890,101709206,221563226
%N A005469 a(n)=1+a([ n/2 ]) a( ceiling ( n/2 ) ).
%D A005469 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%Y A005469 Sequence in context: A053429 A104237 A085945 this_sequence A159929 A026787 
               A064416
%Y A005469 Adjacent sequences: A005466 A005467 A005468 this_sequence A005470 A005471 
               A005472
%K A005469 nonn
%O A005469 1,1
%A A005469 C. L. Mallows (colinm(AT)research.avayalabs.com)