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 A025696 #7 Jul 06 2025 13:47:51 %S A025696 1,2,4,7,11,15,20,26,33,41,49,58,68,79,91,103,116,130,145,161,177,194, %T A025696 212,231,251,271,292,314,337,360,384,409,435,462,489,517,546,576,607, %U A025696 638,670,703,737,772,807,843,880,918,957,996,1036,1077,1119,1162,1205,1249 %N A025696 Index of 3^n within sequence of numbers of form 3^i*4^j. %C A025696 Positions of zeros in A025645. - _R. J. Mathar_, Jul 06 2025 %K A025696 nonn %O A025696 1,2 %A A025696 _David W. Wilson_