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 A048939 #10 Feb 16 2025 08:32:40 %S A048939 1000174288,1000191991,1000198206,1000250010,1000407528,1000425010, %T A048939 1000520010,1000520064,1000812510,1001020252,1001127442,1001139282, %U A048939 1001147422,1001193790,1001240352,1001244420,1001249680,1001288794 %N A048939 10-digit vampire numbers (definition 2). %D A048939 C. A. Pickover, "Vampire Numbers." Ch. 30 in Keys to Infinity. New York: Wiley, pp. 227-231, 1995. %H A048939 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/VampireNumber.html">Vampire Number.</a> %Y A048939 Cf. A014575, A048933, ..., A048938. %K A048939 nonn,fini,base %O A048939 1,1 %A A048939 _Eric W. Weisstein_