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A007768
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From Engel product expansion of 4/7.
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0
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3, 3, 4, 4, 6, 17, 36, 44, 49, 74, 122, 126, 744, 7814, 9238, 9432, 52114, 33241100, 85747623, 353210861, 355051655, 1950030118, 32235431345, 50590143817, 58937626393, 482819610949, 1515905452711, 2679281166868, 25090147463646, 207012319502700
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OFFSET
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1,1
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LINKS
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FORMULA
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a(n) = 1 + floor(1 / ((1-A(n)) * b(n-1))), A(n) = A(n-1) * b(n-1) / (b(n-1) - 1), b(n) = Product_{k=1..n} a(n), b(0) = 1, A(1) = 4/7. - Sean A. Irvine, Jan 23 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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