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 A335929 #4 Jul 04 2020 01:45:01
%S A335929 0,7,7,2,5,4,0,4,9,3,1,9,3,6,9,3,9,4,8,5,6,1,1,9,5,1,7,6,5,4,2,4,4,4,
%T A335929 2,2,5,6,2,7,6,5,6,0,8,2,8,9,3,1,4,0,8,4,7,9,7,9,1,9,5,9,1,6,4,6,1,5,
%U A335929 0,9,4,1,3,4,8,0,2,4,2,1,7,2,4,1,1,6,2
%N A335929 Decimal expansion of the area of the region bounded by y = 1 and y = Gamma(x).
%C A335929 Gamma(1) = Gamma(2) = 1, and the interval (1,2) gives the portion of the graph of y = Gamma x that lies under the line y = 1, as shown by the Mathematica program.
%e A335929 area = 0.07725404931936939485611951765424442256276560828931408...
%t A335929 r = NIntegrate[1 - Gamma[x], {x, 1, 2}, WorkingPrecision -> 200]
%t A335929 RealDigits[r][[1]]
%t A335929 Plot[Gamma[x] - 1, {x, .5, 2.5}]
%Y A335929 Cf. A335960.
%K A335929 nonn,cons
%O A335929 0,2
%A A335929 _Clark Kimberling_, Jul 03 2020