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A258715 Decimal expansion of 2*Sum_{k>=0} 1/Product_{i=0..k} (2^(2^i) - 1). 2
2, 7, 1, 1, 2, 8, 5, 4, 0, 5, 7, 0, 9, 6, 3, 3, 4, 4, 6, 6, 6, 6, 5, 2, 5, 4, 2, 9, 1, 8, 1, 4, 7, 9, 1, 0, 4, 6, 7, 9, 7, 6, 5, 8, 7, 7, 1, 9, 8, 9, 7, 5, 4, 5, 6, 9, 3, 7, 9, 5, 7, 1, 7, 0, 6, 7, 9, 5, 0, 1, 8, 9, 9, 9, 5, 5, 4, 4, 2, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..80.

EXAMPLE

2.7112854057096334466665254291814791046797658771989754...

CROSSREFS

Cf. A258714, A258716.

Sequence in context: A084794 A116691 A225592 * A011340 A081705 A201889

Adjacent sequences:  A258712 A258713 A258714 * A258716 A258717 A258718

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane, Jun 15 2015

STATUS

approved

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Last modified October 17 01:09 EDT 2018. Contains 316275 sequences. (Running on oeis4.)