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 A025704 #7 Jul 06 2025 13:56:48 %S A025704 1,2,4,7,10,14,19,24,30,37,45,53,62,72,82,93,105,118,131,145,160,175, %T A025704 191,208,226,244,263,283,303,324,346,369,392,416,441,466,492,519,547, %U A025704 575,604,634,664,695,727,760,793,827,862,897,933,970,1008,1046,1085,1125,1165 %N A025704 Index of 4^n within sequence of numbers of form 4^i*7^j. %C A025704 Positions of zeros in A025666. - _R. J. Mathar_, Jul 06 2025 %K A025704 nonn %O A025704 1,2 %A A025704 _David W. Wilson_