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A295421
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Decimal expansion of the sum of the reciprocals of the dodecahedral numbers (A006566).
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5
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1, 0, 7, 2, 7, 8, 0, 6, 1, 3, 3, 4, 9, 1, 6, 2, 2, 3, 8, 7, 9, 8, 2, 4, 9, 5, 3, 1, 0, 7, 9, 4, 4, 5, 0, 4, 1, 4, 5, 4, 8, 6, 3, 5, 3, 5, 4, 0, 4, 9, 8, 6, 6, 8, 5, 7, 5, 2, 7, 8, 5, 9, 0, 2, 6, 2, 5, 9, 4, 3, 3, 3, 1, 8, 6, 1, 6, 1, 7, 3, 7, 5, 2, 1, 5, 7, 6
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OFFSET
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1,3
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LINKS
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FORMULA
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Sum_{n>=1} 2/(n(3n-1)(3n-2)) = 1/1 + 1/20 + 1/84 + 1/220 + 1/455 + ... = (sqrt(3)*Pi - 3*log(3))/2.
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EXAMPLE
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1.07278061334916223879...
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MATHEMATICA
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RealDigits[Sum[2/(n(3n-1)(3n-2)), {n, 1, Infinity}], 10, 100][[1]]
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PROG
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CROSSREFS
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Cf. A006566 (dodecahedral numbers).
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KEYWORD
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AUTHOR
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STATUS
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approved
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