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A062043
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Positive numbers whose product of digits is 10 times their sum.
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11
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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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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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A subsequence of A011535 as each term must include the digit 5. - Chai Wah Wu, Dec 09 2015
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LINKS
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EXAMPLE
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594 belongs to the sequence as (5*9*4)/(5+9+4) = 180/18 = 10.
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MAPLE
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filter:= proc(t) local L;
L:= convert(t, base, 10);
convert(L, `*`) = 10*convert(L, `+`)
end proc:
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MATHEMATICA
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Select[Range[10000], Times @@ IntegerDigits[ # ] == 10 Plus @@ IntegerDigits[ # ] &] - Tanya Khovanova, Dec 25 2006
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PROG
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(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)
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CROSSREFS
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Cf. A011540, A034710, A062034, A062035, A062036, A062382, A062037, A062384, A062040, A062041, A062045.
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KEYWORD
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nonn,base,easy
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AUTHOR
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EXTENSIONS
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More terms from Harvey P. Dale and Larry Reeves (larryr(AT)acm.org), Jul 06 2001
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STATUS
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approved
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