%N Numbers of the form k + wt(k) for exactly three distinct k, where wt(k) = A000120(k) is the binary weight of k.
%C The positions of entries equal to 3 in A228085, or numbers that appear exactly thrice in A092391.
%C Numbers that can be expressed as the sum of distinct terms of the form 2^n+1, n=0,1,... in exactly three ways.
%H Reinhard Zumkeller and Donovan Johnson, <a href="/A230092/b230092.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from Reinhard Zumkeller)
%H <a href="/index/Coi#Colombian">Index entries for Colombian or self numbers and related sequences</a>
%p For Maple code see A230091.
%o a230092 n = a230092_list !! (n-1)
%o a230092_list = filter ((== 3) . a228085) [1..]
%o -- _Reinhard Zumkeller_, Oct 13 2013
%Y Cf. A000120, A010061, A228088, A230058, A230091.
%Y Cf. A227915.
%A _N. J. A. Sloane_, Oct 10 2013