A337092 - OEIS

A337092

Decimal expansion of sqrt(40/Pi).

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

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OFFSET

1,1

COMMENTS

A gauge point marked c^1 or c_1 ("c" with a superscripted or subscripted "1") on slide rule calculating devices in the 20th century. The Pickworth reference notes its use "in calculating the contents of cylinders".

REFERENCES

C. N. Pickworth, The Slide Rule, 24th Ed., Pitman, London, 1945, p. 53, Gauge Points.

LINKS

Table of n, a(n) for n=1..86.

Peter Munn, Aristo 89 Slide Rule

Index entries for transcendental numbers

FORMULA

Equals A010494/A002161 = 2*sqrt(10*A049541).

EXAMPLE

3.568248232305...

MAPLE

evalf(sqrt(40.0/Pi)) ; # R. J. Mathar, Sep 02 2020