A010479 Decimal expansion of square root of 23.

4, 7, 9, 5, 8, 3, 1, 5, 2, 3, 3, 1, 2, 7, 1, 9, 5, 4, 1, 5, 9, 7, 4, 3, 8, 0, 6, 4, 1, 6, 2, 6, 9, 3, 9, 1, 9, 9, 9, 6, 7, 0, 7, 0, 4, 1, 9, 0, 4, 1, 2, 9, 3, 4, 6, 4, 8, 5, 3, 0, 9, 1, 1, 4, 4, 4, 8, 2, 5, 7, 2, 3, 5, 9, 0, 7, 4, 6, 4, 0, 8, 2, 4, 9, 2, 1, 9, 1, 4, 4, 6, 4, 3, 6, 9, 1, 8, 8, 6

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• cons
• easy

Comments

Continued fraction expansion is 4 followed by {1, 3, 1, 8} repeated. - Harry J. Smith, Jun 03 2009

Examples

			4.7958315233127195415974380641626939199967070419041293464853...
		

References

• James J. Tattersall, Elementary Number Theory in Nine Chapters, Cambridge University Press, 1999, page 275.

Links

• Harry J. Smith, Table of n, a(n) for n = 1..20000
• Index entries for algebraic numbers, degree 2

Crossrefs

Cf. A010127 (continued fraction).

Programs

Mathematica

RealDigits[N[Sqrt[23], 200]][[1]] (* Vladimir Joseph Stephan Orlovsky, Feb 22 2011 *)

PARI

default(realprecision, 20080); x=sqrt(23); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010479.txt", n, " ", d));  \\ Harry J. Smith, Jun 03 2009