cp's OEIS Frontend

A026362 a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+2m-1, else a(n) = least positive integer that has not yet occurred.

%I A026362 #4 Mar 30 2012 18:56:06
%S A026362 1,1,2,3,4,5,2,6,7,3,8,9,4,10,11,5,12,13,14,15,6,16,17,7,18,19,20,21,
%T A026362 8,22,23,9,24,25,26,27,10,28,29,11,30,31,32,33,12,34,35,13,36,37,14,
%U A026362 38,39,15,40,41,42,43,16,44,45,17,46,47,48,49,18
%N A026362 a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+2m-1, else a(n) = least positive integer that has not yet occurred.
%K A026362 nonn
%O A026362 1,3
%A A026362 _Clark Kimberling_