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A253271
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Decimal expansion of Sum{r^(-2^k), k >= 0}, where r = golden ratio.
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0
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1, 1, 6, 7, 6, 3, 7, 5, 7, 9, 1, 5, 9, 4, 5, 2, 9, 2, 9, 1, 8, 3, 9, 5, 0, 3, 0, 2, 0, 0, 6, 6, 7, 0, 8, 7, 1, 7, 5, 6, 9, 0, 1, 4, 3, 8, 8, 4, 0, 8, 8, 1, 7, 0, 2, 2, 1, 1, 0, 1, 3, 0, 5, 8, 0, 6, 0, 8, 8, 7, 1, 5, 6, 5, 3, 7, 5, 0, 8, 0, 1, 1, 0, 5, 7, 8
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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{1/[F(2^n-1) + r*F(2^n)], k >= 0, where r = golden ratio and F = A000045 (Fibonacci numbers).
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EXAMPLE
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1.167637579159452929183950302006670871756901438...
First 4 terms: 1/r + 1/r^2 + 1/r^4 + 1/r^8.
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MATHEMATICA
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RealDigits[N[Sum[GoldenRatio^(-2^k), {k, 0, 25}], 130]][[1]]
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PROG
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(PARI) suminf(x=0, ((sqrt(5)+1)/2)^(-2^x)) \\ Michel Marcus, May 02 2015
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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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