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A216600
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Number of ways to write n as a product with all factors <= n/4.
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7
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0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 3, 0, 1, 0, 2, 0, 0, 0, 4, 1, 0, 1, 2, 0, 2, 0, 5, 0, 0, 1, 6, 0, 0, 0, 5, 0, 2, 0, 2, 2, 0, 0, 9, 1, 2, 0, 2, 0, 4, 1, 5, 0, 0, 0, 8, 0, 0, 2, 9, 1, 2, 0, 2, 0, 3, 0, 13, 0, 0, 2, 2, 1, 2, 0, 10, 3, 0, 0, 8, 1, 0
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OFFSET
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1,16
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COMMENTS
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a(n) = A066032(n,floor(n/4)) for n > 3.
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LINKS
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EXAMPLE
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a(40) = #{10*4, 10*2*2, 8*5, 5*4*2, 5*2*2*2} = 5;
a(41) = #{} = 0;
a(42) = #{7*6, 7*3*2} = 2;
a(43) = #{} = 0;
a(44) = #{11*4, 11*2*2} = 2;
a(45) = #{9*5, 5*3*3} = 2.
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PROG
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(Haskell)
a216600 n | n <= 3 = 0
| otherwise = a066032_tabl !! (n-1) !! (n `div` 4 - 1)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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