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 A094128 #12 Feb 16 2025 08:32:53 %S A094128 44,116,128,132,152,296,320,332,344,348,380,384,396,440,452,456,464, %T A094128 476,800,872,880,888,944,960,980,992,996,1024,1028,1032,1044,1136, %U A094128 1140,1152,1184,1188,1196,1232,1280,1304,1316,1320,1352,1356,1368 %N A094128 Numbers n that can be factorized n=x*y and containing in their ternary representation the same digits the same number of times as x and y together. %H A094128 J. K. Andersen, <a href="http://primerecords.dk/vampires">Vampire Numbers</a> %H A094128 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/VampireNumber.html">Vampire Number</a> %H A094128 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Ternary.html">Ternary</a> %e A094128 320=16*20, 320->'102212' with 1x'0', 2x'1' and 3x'2': 16->'121' and 20->'202' have together the same ternary digits the same number of times, therefore 320 is a term. %Y A094128 Cf. A020342, A048936, A007089. %K A094128 nonn,base %O A094128 1,1 %A A094128 _Reinhard Zumkeller_, Jun 01 2004