A196932 Decimal expansion of sinh(1)*cosh(1).

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

Offset: 1

Author

Omar E. Pol, Oct 23 2011

Keywords

• nonn
• cons

Comments

Also decimal expansion of sinh(2)/2.

By the Lindemann-Weierstrass theorem, this constant is transcendental. - Charles R Greathouse IV, May 14 2019

Examples

			sinh(1)*cosh(1) = sinh(2)/2 = 1.8134302039235093838341...
		

Links

• G. C. Greubel, Table of n, a(n) for n = 1..10000
• Index entries for transcendental numbers

Crossrefs

Cf. A001113, A073742, A073743.

Programs

Magma

Sinh(2)/2; // G. C. Greubel, Jun 10 2018

Mathematica

RealDigits[Sinh[2]/2, 10, 100][[1]] (* G. C. Greubel, Jun 10 2018 *)

PARI

sinh(2)/2 \\ Charles R Greathouse IV, Apr 21 2016

Formula

Equals Product_{k>=1} 1 + 4/(k * Pi)^2. - Amiram Eldar, Jul 16 2020

Extensions

a(25)-a(72) from John W. Layman, Oct 24 2011