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A322159
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Decimal expansion of 1 - 1/sqrt(5).
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1
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5, 5, 2, 7, 8, 6, 4, 0, 4, 5, 0, 0, 0, 4, 2, 0, 6, 0, 7, 1, 8, 1, 6, 5, 2, 6, 6, 2, 5, 3, 7, 4, 4, 7, 5, 2, 9, 1, 1, 8, 7, 6, 3, 2, 8, 0, 7, 7, 6, 9, 4, 8, 5, 5, 1, 4, 5, 8, 2, 0, 5, 5, 0, 9, 1, 7, 8, 9, 5, 8, 1, 4, 8, 7, 2, 4, 3, 9, 0, 2, 0, 1, 1, 7, 1, 1, 7, 1, 1, 8, 3, 2, 4, 2, 4, 3, 5, 4, 5, 0, 0, 6
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OFFSET
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0,1
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COMMENTS
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Continued fraction: [0;1,1,4,4,4...].
Least root of the polynomial: 5x^2 - 10x + 4.
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LINKS
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FORMULA
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Equals 1/(1 - cos(4*Pi/5)) = (1/2)*csc(2*Pi/5)^2.
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EXAMPLE
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0.552786404500042060718165266253744752911876328077...
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MAPLE
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MATHEMATICA
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RealDigits[1-1/Sqrt[5], 10, 100][[1]] (* Amiram Eldar, Nov 29 2018 *)
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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