This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A216176 #8 Mar 10 2013 16:43:48 %S A216176 1,0,0,2,0,2,0,0,2,0,1,3,0,2,0,0,2,0,2,0,0,2,0,0,2,1,3,1,0,2,0,2,4,0, %T A216176 2,0,0,2,0,2,0,0,2,0,0,2,0,2,0,2,4,0,2,0,0,2,0,0,2,0,2,0,1,3,1,1,3,0, %U A216176 2,0,0,2,2,4,2,0,2,0,2,4,0,2,0,1,3,1 %N A216176 Inner product of the Zeckendorf binary representation of n and its reverse. %C A216176 a(n) = sum (A189920(n,k) * A213676(n,k): k = 1..A072649(n)); %C A216176 a(A027941(n)) = n. %H A216176 Reinhard Zumkeller, <a href="/A216176/b216176.txt">Table of n, a(n) for n = 1..10000</a> %o A216176 (Haskell) %o A216176 a216176 n = sum $ zipWith (*) zs $ reverse zs %o A216176 where zs = a189920_row n %Y A216176 Cf. A159780. %K A216176 nonn %O A216176 1,4 %A A216176 _Reinhard Zumkeller_, Mar 10 2013