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%I #2 Mar 30 2012 18:53:10
%S 1,3,21,163,1259,9657,73949,566797,4352755,33501979,258431853,
%T 1997743677,15473296249
%N Numbers such that n=2*k in triangle A175105.
%C All numbers in this sequence are odd.
%K nonn
%O 1,2
%A _Mats Granvik_, Jul 28 2010