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a(n)=smallest number that gives a product with the sum of digits of n written in base 2 greater than n.

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`%I #4 Oct 04 2012 16:12:59
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`%S 2,3,2,5,3,4,3,9,5,6,4,7,5,5,4,17,9,10,7,11,8,8,6,13,9,9,7,10,8,8,7,
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`%T 33,17,18,12,19,13,13,10,21,14,15,11,15,12,12,10,25,17,17,13,18,14,14,
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`%U 12,19,15,15,12,16,13,13,11,65,33,34,23
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`%N a(n)=smallest number that gives a product with the sum of digits of n written in base 2 greater than n.
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`%F Let sd2(n) the sum of digits of n written in base 2. Then a(n) =1 + Floor(n/sd2(n)).
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`%e 9 is written 1001 in base 2, then sd2(9)=2; 4*2<9<5*2; then (c,9)=5
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`%K easy,nonn,base
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`%O 1,1
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`%A Philippe LALLOUET (philip.lallouet(AT)wanadoo.fr), Jul 27 2007
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