%I #13 Feb 18 2023 09:34:06
%S 1,1,2,2,3,3,4,5,5,6,7,7,8,9,10,10,11,12,12,13,14,15,16,17,17,18,18,
%T 19,21,22,23,23,25,25,26,27,28,29,30,30,32,32,33,33,35,37,38,38,39,40,
%U 40,42,43,44,45,45,46,47,47,49,51,52,52,53,55,56,58,58,59,60,61,62,63,64
%N Duplicate of A024699.
%K dead
%O 1,3
%A _Juri-Stepan Gerasimov_, Nov 30 2009