%I
%S 1,3,3,3,5,5,5,5,5,7,7,7,7,7,7,7,9,9,9,9,9,9,9,9,9,11,13,13,13,15,15,
%T 15,15,15,17,17,17,17,17,17,17,19,19,19,19,19,19,19,19,19,21,23,23,23,
%U 25,25,25,25,25,27,27,27,27,27,27,27,29,29,29,29,29,29,29,29,29,31,33,33
%N 2n+1 appears (last digit of 2n+1) times .
%t Table[Table[n,{Mod[n,10]}],{n,1,35,2}]//Flatten (* _Harvey P. Dale_, Apr 24 2018 *)
%Y Cf. A130146.
%K nonn,base
%O 1,2
%A _Paul Curtz_, Aug 05 2007
