A048935 - OEIS

%I #23 Jul 05 2022 01:21:53

%S 0,7,148,3228,108454,4390670,208423682,11039126154

%N Number of distinct vampire numbers (definition 2) having 2n digits.

%D C. A. Pickover, "Vampire Numbers." Ch. 30 in Keys to Infinity. New York: Wiley, pp. 227-231, 1995.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/VampireNumber.html">Vampire Number.</a>

%Y Cf. A014575, A048938, A048939.

%K nonn,base,hard,more

%O 1,2

%A _Eric W. Weisstein_

%E More terms from _Jens Kruse Andersen_, Dec 01 2002

%E a(8) from _Pierro Zachareas_, Mar 11 2021

%E a(8) corrected by _Pierro Zachareas_, Jul 03 2022