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 A025663 #7 Jul 06 2025 13:55:40 %S A025663 0,1,0,2,1,0,3,2,1,0,4,3,2,1,5,0,4,3,2,6,1,5,0,4,3,7,2,6,1,5,0,4,8,3, %T A025663 7,2,6,1,5,0,9,4,8,3,7,2,6,1,10,5,0,9,4,8,3,7,2,11,6,1,10,5,0,9,4,8,3, %U A025663 12,7,2,11,6,1,10,5,0,9,4,13,8,3,12,7,2,11,6,1,10,5,14,0,9,4,13,8,3,12,7,2,11,6 %N A025663 Exponent of 6 (value of i) in n-th number of form 6^i*10^j. %Y A025663 Cf. A025629. %K A025663 nonn %O A025663 1,4 %A A025663 _David W. Wilson_