A136441 - OEIS

%I #4 Mar 31 2012 20:25:00

%S 2,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,3,1,1,1,1,1,2,1,1,1,1,1,1,

%T 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

%U 2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,4,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1

%N Number of rotational symmetries in the binary expansion of a number with 0 appended to the front.

%H Gary Doran, <a href="/A136441/b136441.txt">Table of n, a(n) for n = 0..100</a>

%e a(0) = 2 because 00 has two rotational symmetries; a(21) = 3 because 010101 has 3 rotational symmetries.

%Y Cf. A138904.

%K base,easy,nonn

%O 0,1

%A _Max Sills_, Apr 03 2008