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 A025684 #7 Jul 06 2025 13:46:14 %S A025684 0,0,0,0,1,0,1,0,1,0,1,2,0,1,2,0,1,2,0,1,2,3,0,1,2,3,0,1,2,3,0,1,2,3, %T A025684 0,4,1,2,3,0,4,1,2,3,0,4,1,2,3,0,4,1,5,2,3,0,4,1,5,2,3,0,4,1,5,2,3,0, %U A025684 4,1,5,2,6,3,0,4,1,5,2,6,3,0,4,1,5,2,6,3,0,4,1,5,2,6,3,0,7,4,1,5,2,6,3,0,7,4,1,5 %N A025684 Exponent of 10 (value of j) in n-th number of form 2^i*10^j. %Y A025684 Cf. A025612. %K A025684 nonn %O A025684 1,12 %A A025684 _David W. Wilson_