A020820 Decimal expansion of 1/sqrt(63).

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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Examples

			0.1259881576697424090715055120780600202719171039563071...
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A010516, A040055.

Programs

Maple

Digits:=100: evalf(1/sqrt(63)); # Wesley Ivan Hurt, Sep 01 2016

Mathematica

RealDigits[Sqrt[1/63],10,120][[1]] (* Harvey P. Dale, Jun 14 2011 *)

Formula

1/sqrt(63) = 1/(3*sqrt(7)) = sqrt(7)/21.