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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 (list; graph; refs; listen; history; 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

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

CROSSREFS

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

Cf. A048934, ..., A048939.

Sequence in context: A118296 A068015 A040422 * A142590 A105706 A022977

Adjacent sequences:  A048930 A048931 A048932 * A048934 A048935 A048936

KEYWORD

nonn,base,more

AUTHOR

Eric Weisstein (eric(AT)weisstein.com)

EXTENSIONS

Edited by N. J. A. Sloane (njas(AT)research.att.com), Jan 03 2009

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Last modified February 17 10:57 EST 2012. Contains 206009 sequences.