# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a346439 Showing 1-1 of 1 %I A346439 #23 Jun 04 2023 01:42:33 %S A346439 9,9,1,6,6,6,9,4,2,2,3,9,0,9,4,1,9,0,5,6,3,4,2,2,9,0,8,4,5,3,9,8,6,2, %T A346439 0,5,3,1,7,5,9,1,5,2,5,0,6,7,8,0,8,3,9,3,3,5,8,1,3,5,9,3,9,3,7,7,8,5, %U A346439 4,7,5,0,2,8,2,5,5,9,2,0,8,1,8,6,3,8,9 %N A346439 Decimal expansion of the constant Sum_{k>=0} (-1)^k/(5*k)!. %H A346439 Michael I. Shamos, A catalog of the real numbers (2011). %e A346439 0.9916669422390941905634229... %t A346439 RealDigits[HypergeometricPFQ[{}, {1/5, 2/5, 3/5, 4/5}, -1/5^5], 10, 120][[1]] (* _Amiram Eldar_, Jun 04 2023 *) %o A346439 (PARI) sumalt(k=0, (-1)^k/(5*k)!) \\ _Michel Marcus_, Jul 18 2021 %Y A346439 Cf. A068985, A049470, A346441, A346440, A346438, A346437, A346436, A346435, A196498. %K A346439 nonn,cons %O A346439 0,1 %A A346439 _Sean A. Irvine_, Jul 17 2021 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE