The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A114609 Decimal expansion of Sum_{k=-infinity..+infinity} log(2)/(2^(-k/2) + 2^(k/2)). 1
 3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5, 9, 5, 1, 8, 2, 3, 8, 3, 2, 8, 8, 4, 2, 3, 9, 5, 1, 3, 3, 7, 1, 9, 5, 7, 4, 6, 4, 7, 4, 3, 0, 2, 5, 6, 3, 7, 8, 1, 8, 2, 2, 2, 9, 2, 9, 0, 4, 4, 4, 3, 1, 7, 2, 5, 0, 9, 1, 3, 0, 3, 0, 4, 8, 2, 7, 0, 4, 2, 4, 1, 7, 6, 1, 0, 1, 2, 3, 7, 5, 1, 5, 3, 5, 6, 7, 5, 8, 5, 1, 1, 9 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Differs from Pi by 5.3*10^-12. LINKS Eric Weisstein's World of Mathematics, Almost Integer EXAMPLE 3.14159265359518238328842... MATHEMATICA almostPi = Log[2]/2 + 2*Log[2]*NSum[1/(2^(-k/2) + 2^(k/2)), {k, 1, Infinity}, WorkingPrecision -> 110, NSumTerms -> 100]; RealDigits[almostPi, 10, 102] // First (* Jean-François Alcover, Feb 07 2013 *) CROSSREFS Sequence in context: A112602 A000796 A212131 * A271452 A339264 A068089 Adjacent sequences: A114606 A114607 A114608 * A114610 A114611 A114612 KEYWORD nonn,cons AUTHOR Eric W. Weisstein, Dec 15 2005 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 7 19:19 EST 2022. Contains 358669 sequences. (Running on oeis4.)