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 A025689 #7 Jul 06 2025 14:20:17 %S A025689 0,0,1,0,1,2,0,1,2,3,0,1,2,3,4,0,1,2,3,4,5,0,1,2,3,4,5,0,6,1,2,3,4,5, %T A025689 0,6,1,7,2,3,4,5,0,6,1,7,2,8,3,4,5,0,6,1,7,2,8,3,9,4,5,0,6,1,7,2,8,3, %U A025689 9,4,10,5,0,6,1,7,2,8,3,9,4,10,5,0,11,6,1,7,2,8,3,9,4,10,5,0,11,6,1,12,7,2,8,3 %N A025689 Exponent of 10 (value of j) in n-th number of form 7^i*10^j. %Y A025689 Cf. A025632. %K A025689 nonn %O A025689 1,6 %A A025689 _David W. Wilson_