cp's OEIS Frontend

A065676 The exponent of 2 in the fractions of the whole ]0, inf[ Stern-Brocot tree (A007305/A047679) [1/1, 1/2, 2/1, 1/3, 2/3, 3/2, 3/1, 1/4, 2/5, 3/5, 3/4, 4/3, 5/3, 5/2, 4/1, ...].

%I A065676 #6 May 01 2014 02:49:15
%S A065676 0,-1,1,0,1,-1,0,-2,1,0,-2,2,0,-1,2,0,1,-3,0,2,-3,0,2,-2,0,3,-2,0,3,
%T A065676 -1,0,-1,1,0,-1,2,0,-2,2,0,-2,3,0,-1,3,0,-1,1,0,-3,1,0,-3,2,0,-2,2,0,
%U A065676 -2,1,0,-1,1,0,1,-1,0,2,-1,0,2,-1,0,3,-1,0,3,-4,0,1,-4,0,1,-1,0,2,-1,0,2,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-2,0,1,-2,0,1,-1
%N A065676 The exponent of 2 in the fractions of the whole ]0, inf[ Stern-Brocot tree (A007305/A047679) [1/1, 1/2, 2/1, 1/3, 2/3, 3/2, 3/1, 1/4, 2/5, 3/5, 3/4, 4/3, 5/3, 5/2, 4/1, ...].
%H A065676 <a href="/index/St#Stern">Index entries for sequences related to Stern's sequences</a>
%p A065676 [seq(exp_of_2(SternBrocotTreeNum(j)/SternBrocotTreeDen(j)),j=1..128)];
%Y A065676 Cf. A065675, A065674, A065658.
%K A065676 sign
%O A065676 1,8
%A A065676 _Antti Karttunen_, Nov 22 2001