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A246726
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Decimal expansion of r_4, the 4th smallest radius < 1 for which a compact packing of the plane exists, with disks of radius 1 and r_4.
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7
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3, 4, 9, 1, 9, 8, 1, 8, 6, 2, 0, 8, 5, 4, 9, 8, 7, 6, 4, 7, 3, 6, 2, 3, 2, 3, 7, 0, 4, 5, 6, 9, 4, 3, 1, 5, 2, 7, 8, 2, 6, 2, 0, 4, 9, 8, 4, 3, 7, 4, 7, 5, 0, 7, 1, 9, 1, 4, 5, 1, 0, 9, 3, 9, 9, 1, 4, 8, 6, 6, 7, 2, 4, 2, 6, 2, 0, 9, 7, 3, 7, 0, 4, 3, 0, 5, 5, 8, 8, 0, 6, 4, 6, 7, 1, 8, 5, 3, 8, 0, 7, 8, 2
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OFFSET
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0,1
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LINKS
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FORMULA
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3rd root of x^4 - 28x^3 - 10x^2 + 4x + 1.
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EXAMPLE
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0.3491981862085498764736232370456943152782620498437475...
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MATHEMATICA
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RealDigits[Root[x^4 - 28x^3 - 10x^2 + 4x + 1, x, 3], 10, 103] // First
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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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