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 A048933 #19 Feb 16 2025 08:32:40 %S A048933 21,15,35,30,21,27,80,201,260,210,204,150,135,158,152,161,167,141,201, %T A048933 231,281,152,231,204,251,201,261,140,179,311,323,315,317,231,351,215, %U A048933 146,350,351,317,156,300,251,261,356,240,269,165,176,396,221,231,371,231,225,201,225,281,216,210,210,327,395,275,252,255 %N A048933 Smallest factor i of any factorization used in the definition of A014575(n). %D A048933 C. A. Pickover, "Vampire Numbers." Ch. 30 in Keys to Infinity. New York: Wiley, pp. 227-231, 1995. %H A048933 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/VampireNumber.html">Vampire Number.</a> %p A048933 # print d, not a, in the program of A014575 - _R. J. Mathar_, Jul 15 2016 %Y A048933 The following sequences are all closely related: A020342, A014575, A080718, A048936, A144563. %Y A048933 Cf. A048934, ..., A048939. %K A048933 nonn,base %O A048933 1,1 %A A048933 _Eric W. Weisstein_ %E A048933 Edited by _N. J. A. Sloane_, Jan 03 2009 %E A048933 More terms from _R. J. Mathar_, Jul 15 2016