

A048936


Subset of A014575 listing numbers which have exactly two such representations of the desired form.


10



125460, 11930170, 12054060, 12417993, 12600324, 12827650, 13002462, 22569480, 23287176, 26198073, 26373600, 26839800, 46847920, 61360780, 1001795850, 1013265360, 1017509850, 1018172470, 1044022896, 1047395790
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OFFSET

1,1


REFERENCES

C. A. Pickover, "Vampire Numbers." Ch. 30 in Keys to Infinity. New York: Wiley, pp. 227231, 1995.


LINKS

Table of n, a(n) for n=1..20.
Eric Weisstein's World of Mathematics, Vampire Number.


EXAMPLE

125460 = 204*615=246*510
11930170 = 1301*9170=1310*9107
12054060 = 2004*6015=2406*5010


CROSSREFS

The following sequences are all closely related: A020342, A014575, A080718, A048936, A144563.
Cf. A014575, A048933, ..., A048939.
Sequence in context: A234783 A206134 A237728 * A237066 A224583 A252208
Adjacent sequences: A048933 A048934 A048935 * A048937 A048938 A048939


KEYWORD

nonn,base


AUTHOR

Eric W. Weisstein


EXTENSIONS

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


STATUS

approved



