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A346435 Decimal expansion of the constant Sum_{k>=0} (-1)^k/(9*k)!.

%I A346435 #27 Jun 04 2023 01:43:09
%S A346435 9,9,9,9,9,7,2,4,4,2,6,8,0,7,7,7,5,7,6,0,3,0,0,4,4,3,0,0,3,8,5,0,5,3,
%T A346435 2,4,9,3,6,6,2,5,4,7,1,5,7,7,4,2,0,9,5,4,8,6,8,2,6,3,4,9,5,7,5,4,1,0,
%U A346435 7,8,5,1,3,8,8,1,5,1,0,4,5,8,8,0,7,7,3
%N A346435 Decimal expansion of the constant Sum_{k>=0} (-1)^k/(9*k)!.
%H A346435 Michael I. Shamos, <a href="http://euro.ecom.cmu.edu/people/faculty/mshamos/cat.pdf">A catalog of the real numbers</a> (2011).
%e A346435 0.99999724426807775760300443003850532493662547157742...
%t A346435 RealDigits[HypergeometricPFQ[{}, {1/9, 2/9, 1/3, 4/9, 5/9, 2/3, 7/9, 8/9}, -1/3^18], 10, 120][[1]] (* _Amiram Eldar_, Jun 04 2023 *)
%o A346435 (PARI) sumalt(k=0, (-1)^k/(9*k)!) \\ _Michel Marcus_, Jul 18 2021
%Y A346435 Cf. A068985, A049470, A346441, A346440, A346439, A346438, A346437, A346436, A196498.
%K A346435 cons,nonn
%O A346435 0,1
%A A346435 _Sean A. Irvine_, Jul 17 2021