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Search: id:A107585
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| 1, 0, 15, 110, 605, 3100, 15595, 78090, 390585, 1953080, 9765575
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OFFSET
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0,3
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COMMENT
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Digit sum = digit product = 5^n.
Numbers a(n)=k such that number m with k 5's and n 1's has digit product=digit sum.
One of the infinite series of numbers with digit product = digit sum. Cf. A107583, A107584.
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EXAMPLE
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n=0, k=1,m=1,ds=dp=1; n=1,k=0,m=5,ds=dp=5; n=2,k=15,m=11111111111111155,ds=dp=25.
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MATHEMATICA
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Table[5^m-5*m, {m, 0, 10}]
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CROSSREFS
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Cf. A107583, A107584.
Sequence in context: A074877 A055504 A060931 this_sequence A054367 A034184 A092646
Adjacent sequences: A107582 A107583 A107584 this_sequence A107586 A107587 A107588
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), May 16 2005
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