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A212224 Decimal expansion of phi^(2/Pi), the base of golden spiral 1
1, 3, 5, 8, 4, 5, 6, 2, 7, 4, 1, 8, 2, 9, 8, 8, 4, 3, 5, 2, 0, 6, 1, 8, 0, 6, 0, 0, 5, 0, 1, 8, 7, 9, 4, 5, 6, 5, 9, 8, 0, 8, 8, 1, 8, 4, 6, 2, 3, 7, 0, 9, 1, 9, 3, 2, 5, 6, 0, 1, 0, 2, 5, 3, 2, 8, 9, 1, 1, 3, 0, 5, 7, 9, 8, 5, 1, 8, 7, 8, 2, 9, 5, 1, 0, 8, 1, 5, 9, 1, 1, 9, 7, 7, 5, 0, 2, 1, 3, 8, 8, 2, 2, 1, 4 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

In polar coordinates (r,theta), a golden spiral equation is r~c^theta, where c is this constant, with phi being the golden ratio (A001622).

LINKS

Table of n, a(n) for n=1..105.

Wikipedia, Golden spiral

EXAMPLE

1.3584562741829884352061806...

MATHEMATICA

RealDigits[GoldenRatio^(2/Pi), 10, 120][[1]] (* Harvey P. Dale, Jul 16 2012 *)

CROSSREFS

Cf. A001622, A212225.

Sequence in context: A175628 A119360 A021283 * A020864 A152304 A021902

Adjacent sequences:  A212221 A212222 A212223 * A212225 A212226 A212227

KEYWORD

nonn,cons,easy

AUTHOR

Stanislav Sykora, May 06 2012

STATUS

approved

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Last modified October 22 11:28 EDT 2014. Contains 248397 sequences.