A190357 Decimal expansion of 1/4 - 2/Pi^2.

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

Offset

0,2

Comments

Constant given on p. 1 of Schlage-Puchta.

Links

G. C. Greubel, Table of n, a(n) for n = 0..10000

Jan-Christoph Schlage-Puchta, Sumsets avoiding squarefree integers, arXiv:1105.1305 [math.NT], May 06 2011.

Index entries for transcendental numbers

Formula

Equals (1/4) - (2/Pi^2).

Example

0.047357632715324457112241...

Mathematica

Join[{0}, RealDigits[(1/4) - (2/Pi^2), 10, 100][[1]]] (* G. C. Greubel, Apr 05 2018 *)

Prog

(PARI) (1/4) - (2/Pi^2) \\ G. C. Greubel, Apr 05 2018
(Magma) R:=RealField(100); [(1/4) - (2/Pi(R)^2)]; // G. C. Greubel, Apr 05 2018

Crossrefs

Cf. A005117, A010716 (1/18), A059956 (6/Pi^2).

Sequence in context: A241026 A198743 A271798 * A372861 A296499 A199446

Adjacent sequences: A190354 A190355 A190356 * A190358 A190359 A190360

Keyword

nonn,easy,cons

Author

Jonathan Vos Post, May 09 2011

Status

approved