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

Offset: 1

Author

Peter Munn, Aug 15 2020

Keywords

• nonn
• cons

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".

Examples

			3.568248232305...
		

References

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

Links

• Peter Munn, Aristo 89 Slide Rule
• Index entries for transcendental numbers

Crossrefs

Cf. A002161, A010494, A190732.

Programs

Maple

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

Mathematica

RealDigits[Sqrt[40/Pi], 10, 100][[1]] (* Amiram Eldar, Aug 15 2020 *)

PARI

sqrt(40/Pi) \\ Michel Marcus, Aug 19 2020

Formula

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