A292819 Decimal expansion of Product_{k>=1} (1 + exp(-Pi*k/2)).

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

Offset: 1

Author

Vaclav Kotesovec, Sep 24 2017

Keywords

• nonn
• cons

Examples

			1.274394985635799307203533971922303756193562507866370867427400202064220...
		

Crossrefs

Cf. A259147, A292823, A292827.

Cf. A292820, A292821, A292822.

Programs

Mathematica

RealDigits[E^(Pi/48) / (2^(1/16) * (Sqrt[2]-1)^(1/4)), 10, 120][[1]]
RealDigits[QPochhammer[-1, E^(-Pi/2)]/2, 10, 120][[1]]

Formula

Equals exp(Pi/48) / (2^(1/16) * (sqrt(2)-1)^(1/4)).

Equals A259148 / A259147.