%I #10 Jan 22 2020 12:57:13

%S 1,3,5,7,9,11,15,17,21,19,23,27,31,33,37,35,45,39,43,51,47,55,63,65,

%T 73,69,67,77,85,75,71,83,93,79,99,91,87,107,103,95,111,119,127,129,

%U 137,133,153,141,149,131,165,157,139,147,135,173,163,155,143,151,189

%N a(n) is the least k such that A331587(n) = k * reverse(k) (where reverse(k) is the binary reversal of k, A030101(k)).

%H Rémy Sigrist, <a href="/A331588/b331588.txt">Table of n, a(n) for n = 1..8347</a>

%H Rémy Sigrist, <a href="/A331588/a331588.gp.txt">PARI program for A331588</a>

%F a(n) = A030101(A331589(n)).

%F a(n) * A331589(n) = A331587(n).

%o (PARI) See Links section.

%Y Cf. A030101, A331587, A331589.

%K nonn,base

%O 1,2

%A _Rémy Sigrist_, Jan 21 2020