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A010472 Decimal expansion of square root of 15. 27
3, 8, 7, 2, 9, 8, 3, 3, 4, 6, 2, 0, 7, 4, 1, 6, 8, 8, 5, 1, 7, 9, 2, 6, 5, 3, 9, 9, 7, 8, 2, 3, 9, 9, 6, 1, 0, 8, 3, 2, 9, 2, 1, 7, 0, 5, 2, 9, 1, 5, 9, 0, 8, 2, 6, 5, 8, 7, 5, 7, 3, 7, 6, 6, 1, 1, 3, 4, 8, 3, 0, 9, 1, 9, 3, 6, 9, 7, 9, 0, 3, 3, 5, 1, 9, 2, 8, 7, 3, 7, 6, 8, 5, 8, 6, 7, 3, 5, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Continued fraction expansion is 3 followed by {1, 6} repeated. - Harry J. Smith, Jun 03 2009
LINKS
FORMULA
Equals 3 + Sum_{k>=0} (-1)^k * binomial(2*k,k)/((k+1) * 6^k). - Amiram Eldar, May 06 2022
EXAMPLE
3.87298334620741688517926539978239961083292170529159082658757376611348309193...
MAPLE
evalf[120](sqrt(15)); # Muniru A Asiru, Feb 12 2019
MATHEMATICA
RealDigits[N[Sqrt[15], 200]][[1]] (* Vladimir Joseph Stephan Orlovsky, Feb 20 2011 *)
PROG
(PARI) default(realprecision, 20080); x=sqrt(15); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010472.txt", n, " ", d)); \\ Harry J. Smith, Jun 03 2009
CROSSREFS
Cf. A040011 (continued fraction).
Sequence in context: A296469 A010629 A016671 * A195435 A134903 A371527
KEYWORD
nonn,cons
AUTHOR
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)