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Search: id:A113856
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A113856 Numbers n such that n=(2d_1+1)*(2d_2+1)*...*(2d_k+1) where d_1 d_2 ... d_k is the decimal expansion of n. +0
1
833, 7425, 17325, 329175, 7194825, 7759125, 275380875, 2256271875, 28879228125, 152156958525, 22342629684375, 2588036347771875, 17452999438621621875, 499296818283476338125, 894477156692665528125 (list; graph; listen)
OFFSET

1,1

EXAMPLE

833 = (2*8+1) * (2*3+1) * (2*3+1) = 17*7*7.

CROSSREFS

Sequence in context: A125519 A045070 A095257 this_sequence A138850 A016113 A118380

Adjacent sequences: A113853 A113854 A113855 this_sequence A113857 A113858 A113859

KEYWORD

base,nonn

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 25 2006

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.


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