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Search: id:A062382
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| A062382 |
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Numbers whose product of digits is 5 times the sum of the digits. |
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+0
1
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| 257, 275, 345, 354, 435, 453, 527, 534, 543, 572, 725, 752, 1258, 1285, 1528, 1582, 1825, 1852, 2158, 2185, 2235, 2253, 2325, 2352, 2518, 2523, 2532, 2581, 2815, 2851, 3225, 3252, 3522, 5128, 5182, 5218, 5223, 5232, 5281, 5322, 5812, 5821, 8125, 8152
(list; graph; listen)
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OFFSET
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0,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,500
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EXAMPLE
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2235 belong to the sequence as (2*2*3*5)/(2+2+3+5) =60/12 = 5.
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PROGRAM
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(PARI) SumD(x)= { s=0; while (x>9, s+=x-10*(x\10); x\=10); return(s + x) } ProdD(x)= { p=1; while (x>9, p*=(x-10*(x\10)); x\=10); return(p*x) } { n=-1; for (m=1, 10^9, if (ProdD(m)==5*SumD(m), write("b062382.txt", n++, " ", m); if (n==500, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 06 2009]
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CROSSREFS
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Sequence in context: A045030 A139653 A060879 this_sequence A105345 A060261 A158231
Adjacent sequences: A062379 A062380 A062381 this_sequence A062383 A062384 A062385
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KEYWORD
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nonn,base,easy
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jun 27 2001
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Jul 06 2001
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