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 A025725 #13 Jul 21 2025 08:56:27 %S A025725 1,2,4,7,11,16,22,29,37,46,56,67,79,92,106,121,136,152,169,187,206, %T A025725 226,247,269,292,316,341,367,394,422,451,481,511,542,574,607,641,676, %U A025725 712,749,787,826,866,907,949,992,1036,1080,1125,1171,1218,1266,1315,1365,1416 %N A025725 Index of 7^n within sequence of numbers of form 7^i*8^j. %C A025725 Positions of zeros in A025675. - _R. J. Mathar_, Jul 06 2025 %Y A025725 Cf. A025675, A036566. %K A025725 nonn %O A025725 1,2 %A A025725 _David W. Wilson_