A196498 Decimal expansion of the constant Sum_{k>=0} (-1)^k/(10*k)!.

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

Offset: 0

Author

R. J. Mathar, Oct 03 2011

Keywords

• cons
• nonn

Examples

			0.99999972442680776055212523675802047...
		

Links

• Michael I. Shamos, A catalog of the real numbers (2011).

Crossrefs

Cf. A195070, A195394.

Cf. A068985, A049470, A346441, A346440, A346439, A346438, A346437, A346436, A346435.

Programs

Mathematica

RealDigits[ HypergeometricPFQ[{}, {1/10, 1/5, 3/10, 2/5, 1/2, 3/5, 7/10, 4/5, 9/10}, -10^-10], 10, 105] // First (* Jean-François Alcover, Feb 12 2013 *)

PARI

sumalt(k=0, (-1)^k/(10*k)!) \\ Michel Marcus, Jul 18 2021

Extensions

6 more digits from Jean-François Alcover, Feb 12 2013