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 A025667 #7 Jul 06 2025 12:44:43 %S A025667 0,0,1,0,1,2,0,1,2,3,0,1,2,3,4,0,1,2,3,4,0,5,1,2,3,4,0,5,1,6,2,3,4,0, %T A025667 5,1,6,2,7,3,4,0,5,1,6,2,7,3,8,4,0,5,1,6,2,7,3,8,4,9,0,5,1,6,2,7,3,8, %U A025667 4,9,0,5,10,1,6,2,7,3,8,4,9,0,5,10,1,6,11,2,7,3,8,4,9,0,5,10,1,6,11,2,7,12,3,8,4 %N A025667 Exponent of 7 (value of j) in n-th number of form 5^i*7^j. %Y A025667 Cf. A003595. %K A025667 nonn %O A025667 1,6 %A A025667 _David W. Wilson_