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Rewrite 0->100 in the binary expansion of n (but leaving single zero as zero) and append 10 to the right.
4

%I #7 Jan 11 2024 09:40:34

%S 2,6,50,14,402,102,114,30,3218,806,818,206,914,230,242,62,25746,6438,

%T 6450,1614,6546,1638,1650,414,7314,1830,1842,462,1938,486,498,126,

%U 205970,51494,51506,12878,51602,12902,12914,3230,52370,13094,13106,3278

%N Rewrite 0->100 in the binary expansion of n (but leaving single zero as zero) and append 10 to the right.

%C Also A080303(n)*4 + 2 for n>0.

%F a(n) = A080303(2*n)/2.

%Y Cf. A080298, A080299.

%K nonn,easy

%O 0,1

%A _Antti Karttunen_, Mar 02 2003