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 A025734 #7 Jul 06 2025 14:24:00 %S A025734 1,5,12,22,35,51,71,94,120,149,181,216,255,297,342,390,441,495,553, %T A025734 614,678,745,815,888,965,1045,1128,1214,1303,1395,1491,1590,1692,1797, %U A025734 1905,2016,2131,2249,2370,2494,2621,2751,2885,3022,3162,3305,3451,3600,3753 %N A025734 Index of 9^n within sequence of numbers of form 2^i*9^j. %C A025734 Positions of zeros in A025638. - _R. J. Mathar_, Jul 06 2025 %K A025734 nonn %O A025734 1,2 %A A025734 _David W. Wilson_