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A065774
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Product of digits of n is equal to the sum of the prime factors of n, counted with multiplicity.
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1
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2, 3, 4, 5, 7, 18, 25, 154, 329, 418, 442, 532, 1519, 1826, 2354, 2472, 2781, 3383, 4343, 4712, 5282, 5561, 6171, 6623, 7922, 9331, 9911, 11248, 12328, 12773, 13125, 14193, 15194, 16512, 17267, 19852, 21479, 24516, 26522, 31816, 32661, 36512
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,400
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PROG
| (PARI) ProdD(x)= { local(p=1); while (x>9 && p>0, p*=(x-10*(x\10)); x\=10); return(p*x) } sopfr(n)= { local(f, s=0); f=factor(n); for(i=1, matsize(f)[1], s+=f[i, 1]*f[i, 2]); return(s) } { n=0; for (m=1, 10^9, if (ProdD(m) == sopfr(m), write("b065774.txt", n++, " ", m); if (n==400, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 30 2009]
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CROSSREFS
| Cf. A001414, A007954.
Sequence in context: A069514 A101012 A048659 * A048459 A203615 A063738
Adjacent sequences: A065771 A065772 A065773 * A065775 A065776 A065777
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KEYWORD
| base,easy,nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Dec 04 2001
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EXTENSIONS
| OFFSET changed from 0,1 to 1,1 by Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 30 2009
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