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A195056 Decimal expansion of Pi^2/7. 1
1, 4, 0, 9, 9, 4, 3, 4, 8, 5, 8, 6, 9, 9, 0, 8, 3, 7, 4, 1, 1, 9, 2, 1, 2, 9, 9, 9, 9, 8, 2, 3, 0, 7, 3, 0, 5, 0, 4, 4, 8, 1, 4, 2, 0, 1, 0, 3, 4, 3, 9, 8, 6, 6, 0, 9, 1, 6, 1, 9, 2, 7, 6, 8, 0, 3, 1, 4, 3, 4, 9, 7, 4, 6, 3, 1, 3, 1, 5, 0, 3, 4, 7, 1, 4, 5, 3, 9, 0, 5, 7, 6, 7, 4, 0, 7, 8, 8, 9, 0, 2, 6, 0, 5, 7 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

F. Aubonnet, D. Guinin and B.Joppin, Précis de Mathématiques, Analyse 2, Classes Préparatoires, Premier Cycle Universitaire, Bréal, 1990, Exercice 908, pages 82 and 91-92.

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..5000

Index entries for transcendental numbers

FORMULA

Equals Sum_{k>=1} A000265(k)/k^3. - Amiram Eldar, Jun 27 2020

Equals Integral_{x=0..1} log(1+x+x^2+x^3+x^4+x^5+x^6)/x dx (Aubonnet). - Bernard Schott, Feb 04 2022

EXAMPLE

1.409943485869908374119212999982307305045...

MATHEMATICA

RealDigits[Pi^2/7, 10, 105][[1]] (* T. D. Noe, Oct 05 2011 *)

PROG

(Magma) Pi(RealField(128))^2/7; // G. C. Greubel, Jun 02 2021

(Sage) numerical_approx(pi^2/7, digits=128) # G. C. Greubel, Jun 02 2021

(PARI) Pi^2/7 \\ Michel Marcus, Feb 04 2022

CROSSREFS

Cf. A000265, A002388, A013661, A019674, A100044, A111003, A164102.

Sequence in context: A269843 A247127 A277896 * A186861 A187027 A187850

Adjacent sequences:  A195053 A195054 A195055 * A195057 A195058 A195059

KEYWORD

nonn,cons

AUTHOR

Omar E. Pol, Oct 04 2011

EXTENSIONS

Extended by T. D. Noe, Oct 05 2011

STATUS

approved

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Last modified September 29 17:46 EDT 2022. Contains 357090 sequences. (Running on oeis4.)