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A091686
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a(n) = 0^n + ((n-9)/9)*(1-10^n).
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3
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1, 8, 77, 666, 5555, 44444, 333333, 2222222, 11111111, 0, -1111111111, -22222222222, -333333333333, -4444444444444, -55555555555555, -666666666666666, -7777777777777777, -88888888888888888, -999999999999999999, -11111111111111111110, -122222222222222222221
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = P(n, n+1, -10) where P(n, m, z) = Product_{k=0..n-1} (z - Sum_{j=1..m} w(n)^(j*k)), where w(n) = e^(2*Pi*i/n), i = sqrt(-1).
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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