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A048933 Smallest factor i of any factorization used in the definition of A014575(n). 7
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 (list; graph; refs; listen; history; text; internal format)
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: A068015 A040422 A214037 * A142590 A105706 A022977

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

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Last modified August 22 20:19 EDT 2017. Contains 290951 sequences.