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A237192 Decimal expansion of 2^i + 2^(-i), where i = sqrt(-1). 2
1, 5, 3, 8, 4, 7, 7, 8, 0, 2, 7, 2, 7, 9, 4, 4, 2, 5, 3, 1, 5, 6, 6, 5, 9, 9, 8, 7, 3, 2, 2, 5, 4, 1, 4, 0, 2, 8, 8, 1, 7, 9, 1, 9, 8, 9, 8, 2, 3, 9, 2, 7, 7, 0, 6, 3, 3, 9, 7, 4, 3, 0, 1, 4, 8, 5, 8, 1, 6, 2, 6, 9, 3, 6, 1, 4, 6, 8, 1, 5, 7, 8, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Approximately equals 1/2*(1+2^(2/3))*2^(1/4) = 1.538477870...
LINKS
FORMULA
Equals 2*cos(log(2)). [Bruno Berselli, Feb 05 2014]
EXAMPLE
1.53847780272794425315665998732254140288179198982392770633974301485816...
MATHEMATICA
RealDigits[ Chop[ N[ 2^I + 2^(-I), 111], 10^-110], 10, 111]
CROSSREFS
Cf. A237193.
Sequence in context: A093203 A021654 A021069 * A161488 A010484 A174930
KEYWORD
nonn,cons,easy
AUTHOR
Robert G. Wilson v, Feb 04 2014
STATUS
approved

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Last modified February 29 11:59 EST 2024. Contains 370425 sequences. (Running on oeis4.)