A060708 The Reuleaux Triangle constant.

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

Offset

1,2

References

Martin Gardner, "The Unexpected Hanging," page 215.

Clifford A. Pickover, The Math Book, Sterling Publishing Co. (New York), 2009, p. 266.

Links

Harry J. Smith, Table of n, a(n) for n = 1..20000

Eric Weisstein's World of Mathematics, Reuleaux Triangle

Wikipedia, Reuleaux triangle

Formula

Equals (Pi - sqrt(3))/2.

Example

0.704770923010457972467598520886815258627182072782362596459568806427941... [Harry J. Smith, Jul 09 2009]

Mathematica

RealDigits[N[(Pi - Sqrt[3])/2, 100]][[1]]

Prog

(PARI) { default(realprecision, 20080); x=(Pi - sqrt(3))/2; for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b060708.txt", n, " ", d)); } \\ Harry J. Smith, Jul 09 2009

Crossrefs

Cf. A060709.

Sequence in context: A177156 A016582 A244662 * A021997 A099737 A271177

Adjacent sequences: A060705 A060706 A060707 * A060709 A060710 A060711

Keyword

nonn,cons

Author

Robert G. Wilson v, Feb 05 2001

Extensions

Final digits of sequence corrected using the b-file. - N. J. A. Sloane, Aug 30 2009

Status

approved