A048935 Number of distinct vampire numbers (definition 2) having 2n digits.

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

Offset: 1

Author

Eric W. Weisstein

Keywords

• nonn
• base
• hard
• more

References

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

Links

• Eric Weisstein's World of Mathematics, Vampire Number.

Crossrefs

Cf. A014575, A048938, A048939.

Extensions

More terms from Jens Kruse Andersen, Dec 01 2002

a(8) from Pierro Zachareas, Mar 11 2021

a(8) corrected by Pierro Zachareas, Jul 03 2022