A176440 -id:A176440 - cp's OEIS frontend

A176441 Decimal expansion of sqrt(210).

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

Offset: 2

Klaus Brockhaus, Apr 19 2010

Continued fraction expansion of sqrt(210) is A040195.

			sqrt(210) = 14.49137674618943857371...

Index entries for algebraic numbers, degree 2.

Cf. A010467 (decimal expansion of sqrt(10)), A010477 (decimal expansion of sqrt(21)), A176440 (decimal expansion of (14+sqrt(210))/4), A040195 (14 followed by (repeat 2, 28)).

RealDigits[Sqrt[210],10,120][[1]]  (* Harvey P. Dale, Apr 21 2011 *)

A010728 Period 2: repeat (7,8).

Original entry on oeis.org

7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7

Offset: 0

N. J. A. Sloane

Index entries for linear recurrences with constant coefficients, signature (0,1).

Cf. A176440.

PadRight[{},120,{7,8}] (* Harvey P. Dale, Dec 15 2012 *)

a(n)=7+n%2 \\ Charles R Greathouse IV, Dec 21 2011

a(n) = -1/2*(-1)^n + 15/2. - Paolo P. Lava, Oct 27 2006

G.f. (-7-8*x) / ( (x-1)*(1+x) ). - R. J. Mathar, Nov 21 2011

cp's OEIS Frontend

A176441 Decimal expansion of sqrt(210).

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