cp's OEIS Frontend

A026350 a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+m-1, else a(n) = least positive integer that has not yet occurred.

%I A026350 #8 Sep 25 2014 21:32:48
%S A026350 1,2,2,3,4,3,5,4,6,7,5,8,9,6,10,7,11,12,8,13,9,14,15,10,16,17,11,18,
%T A026350 12,19,20,13,21,22,14,23,15,24,25,16,26,17,27,28,18,29,30,19,31,20,32,
%U A026350 33,21,34,22,35,36,23,37,38,24,39,25,40,41,26
%N A026350 a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+m-1, else a(n) = least positive integer that has not yet occurred.
%F A026350 a(n+1)=A026242(n)+1, for all n>0. - _M. F. Hasler_, Sep 17 2014
%o A026350 (PARI) A026350=vector(#A026242+1,n,if(n>1,A026242[n-1])+1) \\ Assumes the vector A026242 is defined, cf. there for PARI code. - _M. F. Hasler_, Sep 17 2014
%Y A026350 Cf. A026272.
%K A026350 nonn
%O A026350 1,2
%A A026350 _Clark Kimberling_