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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 A268086 A021340

Adjacent sequences:  A202470 A202471 A202472 * A202474 A202475 A202476

KEYWORD

nonn,cons

AUTHOR

Eric W. Weisstein, Dec 19 2011

STATUS

approved

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Last modified December 2 19:13 EST 2016. Contains 278683 sequences.