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A184084
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Decimal expansion of product_{p=primes} (1-1/(2^p+1)).
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3
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6, 8, 3, 7, 9, 2, 8, 4, 2, 3, 5, 9, 4, 7, 4, 3, 6, 8, 9, 9, 4, 3, 6, 3, 6, 4, 3, 4, 1, 0, 7, 6, 3, 4, 4, 4, 3, 6, 8, 2, 2, 1, 0, 8, 7, 5, 8, 1, 8, 1, 7, 3, 5, 2, 6, 2, 9, 4, 7, 1, 2, 9, 8, 1, 0, 5, 5, 9, 9, 0, 4, 2, 3, 5, 5, 6, 5, 5, 7, 7, 7
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OFFSET
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0,1
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COMMENTS
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LINKS
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FORMULA
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Equals product_{p in A000040} (1-1/(2^p+1)) = 1/ product_p (1+2^(-p)) = product_{n>=1} (1-1/A098640(n)).
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EXAMPLE
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(1-1/5) *(1-1/9) *(1-1/33) * (1-1/129) *(1-1/2049)* ... = 0.6837928423594743689943636...
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MATHEMATICA
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RealDigits[Times@@Table[1-1/(2^p+1), {p, Prime[Range[1000]]}], 10, 100][[1]] (* Harvey P. Dale, Jul 23 2024 *)
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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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