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 A025496 #7 Oct 19 2019 16:08:15 %S A025496 1,2,2,3,3,3,6,6,7,7,8,11,13,9,6,14,14,15,16,17,18,18,17,19,20,18,20, %T A025496 19,19,24,25,28,25,29,29,30,27,31,31,32,32,28,36,30,41,33,30,34,44,48, %U A025496 42,35,37,45,43,52,51,56,47,50,46,47,41,49,60,58,55,49,48,53,53,68,54,58,60,62 %N A025496 Number of terms in Zeckendorf representation of 4^n. %H A025496 Amiram Eldar, <a href="/A025496/b025496.txt">Table of n, a(n) for n = 0..1000</a> %Y A025496 Cf. A007895. %K A025496 nonn %O A025496 0,2 %A A025496 _Clark Kimberling_