The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A275408 Decimal expansion of Pi/(4*log(2)). 1
 1, 1, 3, 3, 0, 9, 0, 0, 3, 5, 4, 5, 6, 7, 9, 8, 4, 5, 2, 4, 0, 6, 9, 2, 0, 7, 3, 6, 4, 2, 9, 1, 6, 6, 7, 0, 2, 5, 4, 2, 9, 6, 5, 3, 6, 6, 9, 3, 0, 9, 4, 8, 8, 9, 6, 0, 4, 6, 5, 0, 4, 1, 3, 6, 9, 8, 5, 1, 5, 0, 2, 3, 8, 4, 3, 0, 3, 2, 6, 2, 7, 5, 5, 6, 4, 7, 7 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Table of n, a(n) for n=1..87. FORMULA Equals (Sum_{n>=0} (-1)^n/(2*n+1)) / (Sum_{n>=1} (-1)^(n+1)/n) = A003881 / A002162. Equals Integral_{x=0..oo} 1/(2^x + 2^(-x)) dx. - Amiram Eldar, Jul 16 2020 EXAMPLE 1.133090035456798452406920736429166702542965366930948896046504136985... MATHEMATICA A275408L[n_] := RealDigits[Pi/(4 Log[2]), 10, n][[1]]; A275408L[50] (* JungHwan Min, Jul 29 2016 *) PROG (PARI) Pi/(4*log(2)) \\ Michel Marcus, Jul 27 2016 CROSSREFS Cf. A002162, A003881, A185280 (Inverse). Sequence in context: A093755 A176276 A200701 * A169670 A372004 A341748 Adjacent sequences: A275405 A275406 A275407 * A275409 A275410 A275411 KEYWORD nonn,cons AUTHOR Terry D. Grant, Jul 26 2016 EXTENSIONS More digits from Jon E. Schoenfield, Mar 15 2018 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 May 27 18:18 EDT 2024. Contains 372880 sequences. (Running on oeis4.)