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 A025719 #7 Jul 06 2025 14:06:38 %S A025719 1,2,4,7,11,15,20,26,33,41,49,58,68,79,90,102,115,129,144,159,175,192, %T A025719 210,228,247,267,288,310,332,355,379,404,429,455,482,510,539,568,598, %U A025719 629,661,693,726,760,795,831,867,904,942,981,1020,1060,1101,1143,1186,1229 %N A025719 Index of 6^n within sequence of numbers of form 6^i*10^j. %C A025719 Positions of zeros in A025688. - _R. J. Mathar_, Jul 06 2025 %K A025719 nonn %O A025719 1,2 %A A025719 _David W. Wilson_