login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A202473 Decimal expansion of the surface area of a unit Reuleaux triangle 0
2, 9, 7, 5, 4, 7, 1, 7, 1, 6, 5, 8, 4, 4, 0, 1, 6, 2, 9, 2, 7, 2, 4, 2, 1, 8, 5, 7, 7, 7, 2, 2, 5, 0, 3, 1, 0, 7, 9, 1, 2, 3, 5, 0, 2, 6, 6, 0, 9, 1, 3, 9, 4, 6, 4, 7, 9, 9, 6, 8, 6, 7, 3, 2, 5, 1, 0, 6, 6, 9, 5, 8, 9, 6, 8, 1, 0, 6, 2, 4, 0, 7, 6, 6, 5, 7, 4, 9, 4, 3, 9, 6, 6, 1, 4, 3, 9, 9, 6, 3, 3, 5, 6, 1, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

Eric Weisstein's World of Mathematics, Reuleaux Tetrahedron

FORMULA

8*Pi - 18*arccos(1/3)

EXAMPLE

2.9754717165844016292...

MATHEMATICA

RealDigits[8*Pi - 18*ArcCos[1/3], 10, 100][[1]]

CROSSREFS

Sequence in context: A013500 A244596 A176977 * A180310 A021340 A241753

Adjacent sequences:  A202470 A202471 A202472 * A202474 A202475 A202476

KEYWORD

nonn,cons

AUTHOR

Eric W. Weisstein, Dec 19 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified November 29 00:35 EST 2014. Contains 250479 sequences.