A010507 Decimal expansion of square root of 54.

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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Comments

Continued fraction expansion is 7 followed by {2, 1, 6, 1, 2, 14} repeated. - Harry J. Smith, Jun 06 2009

Surface area to volume ratio of an octahedron with unit side length. - Wesley Ivan Hurt, May 02 2021

Examples

			7.348469228349534294591852224117674175897842441970010385298077701752881...
		

Links

• Harry J. Smith, Table of n, a(n) for n = 1..20000
• Wikipedia, Surface-area-to-volume ratio
• Index entries for algebraic numbers, degree 2.

Crossrefs

Cf. A010140 (continued fraction).

Programs

Mathematica

RealDigits[N[Sqrt[54],200]][[1]] (* Vladimir Joseph Stephan Orlovsky, Feb 24 2011 *)

PARI

{ default(realprecision, 20080); x=sqrt(54); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010507.txt", n, " ", d)); } \\ Harry J. Smith, Jun 06 2009