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A062043

Positive numbers whose product of digits is 10 times their sum.

459, 495, 549, 594, 945, 954, 1566, 1656, 1665, 2259, 2295, 2355, 2529, 2535, 2553, 2592, 2925, 2952, 3255, 3525, 3552, 5166, 5229, 5235, 5253, 5292, 5325, 5352, 5523, 5532, 5616, 5661, 5922, 6156, 6165, 6516, 6561, 6615, 6651, 9225, 9252, 9522

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OFFSET

1,1

COMMENTS

A subsequence of A011535 as each term must include the digit 5. - Chai Wah Wu, Dec 09 2015

LINKS

Harry J. Smith, Table of n, a(n) for n = 1..500

EXAMPLE

594 belongs to the sequence as (5*9*4)/(5+9+4) = 180/18 = 10.

MAPLE

filter:= proc(t) local L;

L:= convert(t, base, 10);

convert(L, `*`) = 10*convert(L, `+`)

end proc:

select(filter, [$1..10^5]); # Robert Israel, Sep 11 2022

MATHEMATICA

Select[Range[10000], Times @@ IntegerDigits[ # ] == 10 Plus @@ IntegerDigits[ # ] &] (* Tanya Khovanova, Dec 25 2006 *)

PROG

(PARI) isok(n) = my(d=digits(n)); vecprod(d)==10*vecsum(d) \\ Mohammed Yaseen, Sep 11 2022

(Python)

from math import prod

def ok(n): d = list(map(int, str(n))); return prod(d) == 10*sum(d)

print([k for k in range(1, 9999) if ok(k)]) # Michael S. Branicky, Sep 11 2022

CROSSREFS

Cf. A011540, A034710, A062034, A062035, A062036, A062382, A062037, A062384, A062040, A062041, A062045.

Cf. A011535, A124694.

Sequence in context: A251468 A098765 A286845 * A331468 A160851 A124620

Adjacent sequences: A062040 A062041 A062042 * A062044 A062045 A062046

KEYWORD

nonn,base,easy

AUTHOR

Amarnath Murthy, Jun 28 2001

EXTENSIONS

More terms from Harvey P. Dale and Larry Reeves (larryr(AT)acm.org), Jul 06 2001

STATUS

approved

URL: https://oeis.org/A062043

⇱ A062043 - OEIS