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 A025660 #7 Jul 06 2025 14:10:55 %S A025660 0,1,0,2,1,0,3,2,1,0,4,3,2,1,0,5,4,3,2,1,0,6,5,4,3,2,1,0,7,6,5,4,3,2, %T A025660 1,0,8,7,6,5,4,3,2,1,0,9,8,7,6,5,4,3,2,1,0,10,9,8,7,6,5,4,3,2,1,0,11, %U A025660 10,9,8,7,6,5,4,3,2,1,0,12,11,10,9,8,7,6,5,4,3,2,1,13,0,12,11,10,9,8,7,6,5,4,3 %N A025660 Exponent of 6 (value of i) in n-th number of form 6^i*7^j. %Y A025660 Cf. A025626. %K A025660 nonn %O A025660 1,4 %A A025660 _David W. Wilson_