%I A073897
%S A073897 1,3,5,2,7,4,9,6,8,10,11,12,13,14,16,18,15,20,17,22,24,26,19,28,30,32,
%T A073897 34,36,21,38,23
%N A073897 a(1) = 1, a(n) = smallest odd or even number not occurring earlier according 
               as n is prime or composite.
%Y A073897 Cf. A073898.
%Y A073897 Sequence in context: A064790 A113966 A164611 this_sequence A097465 A120683 
               A079313
%Y A073897 Adjacent sequences: A073894 A073895 A073896 this_sequence A073898 A073899 
               A073900
%K A073897 nonn
%O A073897 1,2
%A A073897 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 18 2002