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.
Index entries for linear recurrences with constant coefficients, signature (1).
FORMULA
Equals A021028 plus 3.1. - R. J. Mathar, Mar 27 2012
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
AUTHOR
N. J. A. Sloane, Mar 24 2012
STATUS
approved