A048933 Smallest factor i of any factorization used in the definition of A014575(n).

21, 15, 35, 30, 21, 27, 80, 201, 260, 210, 204, 150, 135, 158, 152, 161, 167, 141, 201, 231, 281, 152, 231, 204, 251, 201, 261, 140, 179, 311, 323, 315, 317, 231, 351, 215, 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

Offset

1,1

References

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

Links

Table of n, a(n) for n=1..66.

Eric Weisstein's World of Mathematics, Vampire Number.

Maple

# print d, not a, in the program of A014575 - R. J. Mathar, Jul 15 2016

Crossrefs

The following sequences are all closely related: A020342, A014575, A080718, A048936, A144563.

Cf. A048934, ..., A048939.

Sequence in context: A040422 A214037 A321281 * A142590 A346064 A291469

Adjacent sequences: A048930 A048931 A048932 * A048934 A048935 A048936

Keyword

nonn,base

Author

Eric W. Weisstein

Extensions

Edited by N. J. A. Sloane, Jan 03 2009

More terms from R. J. Mathar, Jul 15 2016

Status

approved