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A098736 a(n) = product of n and all its digits. 4
0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 0, 11, 24, 39, 56, 75, 96, 119, 144, 171, 0, 42, 88, 138, 192, 250, 312, 378, 448, 522, 0, 93, 192, 297, 408, 525, 648, 777, 912, 1053, 0, 164, 336, 516, 704, 900, 1104, 1316, 1536, 1764, 0, 255, 520, 795, 1080, 1375, 1680, 1995 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for Colombian or self numbers and related sequences

FORMULA

If n=abcd (say) in decimal, then a(n) = abcd * a * b * c * d.

a(n) = n*A007954(n). - R. J. Mathar, Sep 27 2013

EXAMPLE

a(15) = 15*1*5=75

MAPLE

with transforms; [seq(n*digprod(n), n=0..200)]; # N. J. A. Sloane, Oct 12 2013

MATHEMATICA

Array[# Times@@ IntegerDigits@#&, 60, 0] (* Vincenzo Librandi, Oct 13 2013 *)

CROSSREFS

Cf. A007954, A230101.

Sequence in context: A085942 A066308 A063462 * A002015 A257587 A257588

Adjacent sequences:  A098733 A098734 A098735 * A098737 A098738 A098739

KEYWORD

base,easy,nonn

AUTHOR

Alexandre Wajnberg, Sep 30 2004

EXTENSIONS

More terms from Sam Alexander, Jan 06 2005

Corrected by Vincenzo Librandi, Oct 13 2013

STATUS

approved

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Last modified September 18 09:40 EDT 2019. Contains 327168 sequences. (Running on oeis4.)