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a(n) is the least k such that A092213(n) = k + reverse(k) (where reverse(k) is the binary reverse of k, A030101(k)).
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%I #29 Jan 22 2020 12:56:26

%S 0,1,2,4,3,6,5,7,10,16,9,14,11,20,18,15,32,17,22,26,21,19,30,34,23,27,

%T 44,31,38,64,33,50,46,37,54,35,68,45,62,39,66,76,51,84,47,55,74,70,92,

%U 63,128,65,98,78,86,73,106,69,102,94,67,132,77,110,85,118

%N a(n) is the least k such that A092213(n) = k + reverse(k) (where reverse(k) is the binary reverse of k, A030101(k)).

%H Rémy Sigrist, <a href="/A330340/b330340.txt">Table of n, a(n) for n = 0..7528</a>

%H Rémy Sigrist, <a href="/A330340/a330340.gp.txt">PARI program for A330340</a>

%F a(n) + A030101(a(n)) = A092213(n).

%F a(n) <= A331585(n).

%e For n = 3:

%e - A092213(3) = 5,

%e - 4 is the least k such that k + reverse(k) = 5,

%e - so a(3) = 4.

%o (PARI) See Links section.

%Y Cf. A030101, A055944, A092213, A331585.

%K nonn,base

%O 0,3

%A _Rémy Sigrist_, Jan 21 2020