A180310 Decimal expansion of Pi/2 - 4/Pi.

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

Offset: 0

Author

Eric W. Weisstein, Aug 26 2010

Keywords

• nonn
• cons

Comments

Torsional rigidity constant for a half-disk shaped shaft.

Examples

			0.29755678205973393308...
		

Links

• Index entries for transcendental numbers

Crossrefs

Cf. A019669, A088538.

Programs

Mathematica

RealDigits[-4/Pi+Pi/2,10,120][[1]] (* Harvey P. Dale, May 02 2012 *)

PARI

Pi/2 - 4/Pi \\ Stefano Spezia, May 26 2025

Formula

Equals A019669 - A088538.