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 A025654 #7 Jul 06 2025 12:43:55 %S A025654 0,1,0,2,1,0,3,2,1,4,0,3,2,5,1,4,0,3,6,2,5,1,4,0,7,3,6,2,5,1,8,4,0,7, %T A025654 3,6,2,9,5,1,8,4,0,7,3,10,6,2,9,5,1,8,4,0,11,7,3,10,6,2,9,5,1,12,8,4, %U A025654 0,11,7,3,10,6,2,13,9,5,1,12,8,4,0,11,7,3,14,10,6,2,13,9,5,1,12,8,4,15,0,11,7,3 %N A025654 Exponent of 5 (value of i) in n-th number of form 5^i*9^j. %Y A025654 Cf. A025624. %K A025654 nonn %O A025654 1,4 %A A025654 _David W. Wilson_