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A100954 Decimal expansion of 7/2 - sqrt(2)/4. 1
3, 1, 4, 6, 4, 4, 6, 6, 0, 9, 4, 0, 6, 7, 2, 6, 2, 3, 7, 7, 9, 9, 5, 7, 7, 8, 1, 8, 9, 4, 7, 5, 7, 5, 4, 8, 0, 3, 5, 7, 5, 8, 2, 0, 3, 1, 1, 5, 5, 7, 6, 2, 9, 8, 1, 7, 0, 5, 8, 3, 0, 0, 6, 5, 5, 0, 2, 3, 1, 6, 8, 8, 0, 3, 8, 4, 4, 7, 3, 2, 4, 0, 2, 8, 7, 4, 0, 3, 1, 1, 6, 4, 1, 8, 0, 8, 9, 6, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

An approximation to Pi, see Blatner. - Robert G. Wilson v, Dec 15 2012

This constant is three plus the ratio of the area (A) to the perimeter (P) of an isosceles right triangle with unit legs, 3 + A/P = 3 + (1/2)/(2 + sqrt(2)). - José de Jesús Camacho Medina, Mar 02 2018

REFERENCES

David Blatner, Spectrums, Our Mind-Boggling Universe from Infinitesimal to Infinity, Walker & Co, USA, 2012.

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

EXAMPLE

3.14644660940672623779957781894757548035758203115576298170583...

MATHEMATICA

RealDigits[(14 - Sqrt[2])/4, 10, 111][[1]] (* Robert G. Wilson v, Dec 15 2012 *)

PROG

(PARI) 7/2 - sqrt(2)/4 \\ Charles R Greathouse IV, Mar 25 2014

(MAGMA) SetDefaultRealField(RealField(100)); (14 - Sqrt(2))/4; // G. C. Greubel, Oct 01 2018

CROSSREFS

Sequence in context: A306804 A199372 A011089 * A071315 A072267 A024934

Adjacent sequences:  A100951 A100952 A100953 * A100955 A100956 A100957

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane, Jan 11 2005

STATUS

approved

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Last modified February 25 21:00 EST 2020. Contains 332258 sequences. (Running on oeis4.)