A202473 - OEIS

A202473

Decimal expansion of the surface area of a unit Reuleaux triangle.

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]]