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 A386440 #59 Sep 01 2025 18:01:13
%S A386440 0,0,0,0,2,4,8,0,1,5,8,7,3,4,9,3,8,2,0,7,4,9,1,2,7,8,7,1,7,7,8,4,7,0,
%T A386440 6,9,2,9,5,2,3,8,2,8,0,5,9,6,8,5,1,5,6,7,8,8,2,6,8,6,4,6,2,5,3,3,5,7,
%U A386440 8,9,6,6,5,9,6,3,1,8,9,3,2,4,7,7,1,8,8,5,9,8,7,0,5,2,5,1,8,4,8,1,1,4,9,7
%N A386440 Decimal expansion of Sum_{k>=1} 1/(8k)!.
%H A386440 Jason Bard, <a href="/A386440/b386440.txt">Table of n, a(n) for n = 0..1003</a>
%H A386440 Michael I. Shamos, <a href="http://euro.ecom.cmu.edu/people/faculty/mshamos/cat.pdf">A catalog of the real numbers</a>, (2007). See p. 21. (Erroneously misses a leading zero)
%e A386440 0.00002480158734938207491278717784706929523828059685156788...
%t A386440 RealDigits[-1 + HypergeometricPFQ[{}, Range[1, 7]/8, 2^-24], 10, 100][[1]]
%Y A386440 Cf. A091131, A195070.
%K A386440 nonn,cons,new
%O A386440 0,5
%A A386440 _Jason Bard_, Aug 25 2025