login
A210622
Decimal expansion of 377/120.
1
3, 1, 4, 1, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6
OFFSET
1,1
COMMENTS
Claudius Ptolemy's estimate for Pi.
REFERENCES
Petr Beckmann, A History of Pi, 3rd Ed., Boulder, Colorado: The Golem Press (1974): p. 26.
David Wells, The Penguin Dictionary of Curious and Interesting Numbers. Penguin Books, NY, 1986, Revised edition 1987. See p. 49.
LINKS
Dario Castellanos, The ubiquitous Pi, Math. Mag., 61 (1988), pp. 67-98 and pp. 148-163.
FORMULA
Equals A021028 plus 3.1. - R. J. Mathar, Mar 27 2012
Equals 3 + A122553 + A021016/10. - Stefano Spezia, Jul 08 2022
From Elmo R. Oliveira, Aug 02 2024: (Start)
G.f.: x*(3 + x + 4*x^2 + x^3) + 6*x^5/(1 - x).
a(n) = 6 for n >= 5. (End)
EXAMPLE
3.1416666666666666666666666666666666666666666666666666666666...
MATHEMATICA
RealDigits[377/120, 10, 120][[1]] (* or *) PadRight[{3, 1, 4, 1}, 120, {6}] (* Harvey P. Dale, Dec 06 2017 *)
PROG
(PARI) 377/120. \\ Charles R Greathouse IV, Mar 25 2014
CROSSREFS
KEYWORD
nonn,cons,easy
AUTHOR
N. J. A. Sloane, Mar 24 2012
STATUS
approved