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A048936 Subset of vampire numbers A014575 having exactly two representations of the desired form. 10

%I #24 Mar 11 2021 21:05:12

%S 125460,11930170,12054060,12417993,12600324,12827650,13002462,

%T 22569480,23287176,26198073,26373600,26839800,46847920,61360780,

%U 1001795850,1013265360,1017509850,1018172470,1044022896,1047395790

%N Subset of vampire numbers A014575 having exactly two representations of the desired form.

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

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/VampireNumber.html">Vampire Number.</a>

%e 125460 = 204*615 = 246*510.

%e 11930170 = 1301*9170 = 1310*9107.

%e 12054060 = 2004*6015 = 2406*5010.

%Y Closely related: A020342, A014575, A080718, A280928, A144563.

%Y Cf. A014575, A048933, ..., A048939.

%K nonn,base

%O 1,1

%A _Eric W. Weisstein_

%E Edited by _N. J. A. Sloane_, Jan 03 2009

%E Name edited by _M. F. Hasler_, Mar 11 2021

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)