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Search: id:A062034
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| A062034 |
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Numbers whose product of digits is twice the sum of the digits. |
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+0
1
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| 36, 44, 63, 138, 145, 154, 183, 224, 242, 318, 381, 415, 422, 451, 514, 541, 813, 831, 1146, 1164, 1225, 1233, 1252, 1323, 1332, 1416, 1461, 1522, 1614, 1641, 2125, 2133, 2152, 2215, 2222, 2251, 2313, 2331, 2512, 2521, 3123, 3132, 3213, 3231, 3312, 3321
(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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1225 belong to the sequence as (1*2*2*5)/(1+2+2+5) =20/10 = 2.
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PROGRAM
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(PARI) SumD(x)= { s=0; while (x>9, s=s+x-10*(x\10); x=x\10); return(s + x) } ProdD(x)= { p=1; while (x>9, p=p*(x-10*(x\10)); x=x\10); return(p*x) } { n=-1; for (m=1, 2111281, if (ProdD(m)==2*SumD(m), write("b062034.txt", n++, " ", m)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 30 2009]
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CROSSREFS
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Sequence in context: A078299 A062519 A138566 this_sequence A048034 A144291 A068143
Adjacent sequences: A062031 A062032 A062033 this_sequence A062035 A062036 A062037
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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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Corrected and extended by Larry Reeves (larryr(AT)acm.org), Jul 06 2001
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