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A101464 Decimal expansion of sqrt(2-sqrt(2)), edge length of a regular octagon with circumradius 1. 5
7, 6, 5, 3, 6, 6, 8, 6, 4, 7, 3, 0, 1, 7, 9, 5, 4, 3, 4, 5, 6, 9, 1, 9, 9, 6, 8, 0, 6, 0, 7, 9, 7, 7, 3, 3, 5, 2, 2, 6, 8, 9, 1, 2, 4, 9, 7, 1, 2, 5, 4, 0, 8, 2, 8, 6, 7, 6, 0, 1, 2, 7, 1, 2, 5, 5, 0, 9, 2, 0, 6, 7, 9, 2, 0, 1, 7, 9, 3, 8, 4, 4, 7, 4, 0, 2, 7, 5, 7, 0, 6, 8, 4, 5, 6, 7, 0, 9, 4, 2, 9, 6, 8, 4, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

Mohammad K. Azarian, Circumradius and Inradius, Problem S125, Math Horizons, Vol. 15, Issue 4, April 2008, p. 32.  Solution published in Vol. 16, Issue 2, November 2008, p. 32.

LINKS

Table of n, a(n) for n=0..104.

Eric Weisstein's World of Mathematics, Octagon.

EXAMPLE

0.765366864730179543456919968060797733522689124971254082867601271255092067920...

MATHEMATICA

RealDigits[Sqrt[2-Sqrt[2]], 10, 120][[1]] (* Harvey P. Dale, Jun 22 2011 *)

CROSSREFS

Cf. A179260 (sqrt(2+sqrt(2))).

Sequence in context: A198816 A196553 A244921 * A072558 A022963 A023449

Adjacent sequences:  A101461 A101462 A101463 * A101465 A101466 A101467

KEYWORD

cons,nonn

AUTHOR

Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Jan 20 2005

STATUS

approved

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Last modified March 24 06:12 EDT 2017. Contains 283984 sequences.