This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A271574 #12 Sep 04 2025 21:55:35
%S A271574 2,1,2,9,7,0,2,5,4,8,9,8,3,3,0,6,4,1,8,1,3,4,5,2,3,6,1,0,5,9,5,4,1,3,
%T A271574 4,6,8,3,1,9,2,2,0,7,4,7,0,3,9,1,6,9,3,0,3,7,6,2,9,9,6,8,6,0,2,9,9,9,
%U A271574 9,6,2,2,9,2,9,9,8,7,3,0,1,7,9,6,3,8,3,2,7,8,1,2,7,1,0,4,2,2,4,9,3,5,6,4,4
%N A271574 Decimal expansion of Sum_{n>=0} 1/(n!)^3.
%H A271574 Kelvin Voskuijl, <a href="/A271574/b271574.txt">Table of n, a(n) for n = 1..20000</a>
%e A271574 2.1297025489833064181345236105954134683192207470391693...
%p A271574 evalf(Sum(1/n!^3, n=0..infinity), 120); # _Vaclav Kotesovec_, Apr 10 2016
%t A271574 RealDigits[HypergeometricPFQ[{}, {1, 1}, 1], 10, 120][[1]]
%t A271574 RealDigits[Total[1/(Range[0,200]!)^3],10,120][[1]] (* _Harvey P. Dale_, Mar 06 2024 *)
%o A271574 (PARI) default(realprecision, 120); sumpos(n=0, 1/n!^3)
%Y A271574 Cf. A001113, A070910.
%K A271574 nonn,cons,changed
%O A271574 1,1
%A A271574 _Vaclav Kotesovec_, Apr 10 2016