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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
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
KEYWORD
nonn,cons
AUTHOR
Terry D. Grant, Jul 26 2016
EXTENSIONS
More digits from Jon E. Schoenfield, Mar 15 2018
STATUS
approved

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Last modified May 27 18:18 EDT 2024. Contains 372880 sequences. (Running on oeis4.)