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A344554
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Decimal expansion of 2*(1+sqrt(26))/5.
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4
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2, 4, 3, 9, 6, 0, 7, 8, 0, 5, 4, 3, 7, 1, 1, 3, 9, 3, 2, 0, 1, 1, 2, 8, 9, 6, 4, 3, 6, 0, 9, 1, 1, 2, 7, 9, 5, 8, 2, 5, 5, 0, 8, 3, 7, 8, 4, 3, 9, 8, 3, 8, 5, 6, 3, 0, 3, 3, 9, 8, 8, 3, 2, 1, 7, 7, 0, 3, 7, 3, 4, 5, 2, 8, 2, 4, 8, 8, 9, 6, 7, 8, 2, 3, 5, 3, 3, 9, 5, 4, 0, 4, 3, 7
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OFFSET
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1,1
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COMMENTS
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Dissect the unit square into 5 regions with equal areas from a given midpoint on the squares edge. This sequence gives the decimal expansion of the perimeter of the triangular region with unit height.
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LINKS
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FORMULA
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Decimal expansion of 2*(1 + k*sqrt(1/k^2 + 1))/k, where k = 5.
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EXAMPLE
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2.43960780543711393201128964360...
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MATHEMATICA
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RealDigits[2 (1 + Sqrt[26])/5, 10, 200][[1]] // Flatten
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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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