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 A201506 #15 Aug 17 2021 01:47:21
%S A201506 1,0,5,7,4,7,3,5,5,3,7,0,4,6
%N A201506 Decimal expansion of the growth constant of sequences x_{n+1} = x_n + c_{n+1} *x_{n-1} with normally distributed random coefficients c_n.
%H A201506 Steven R. Finch, <a href="https://doi.org/10.1017/9781316997741">Mathematical Constants II</a>, Encyclopedia of Mathematics and Its Applications, Cambridge University Press, Cambridge, 2018, p. 569.
%H A201506 T. G. Wright, L. N. Trefethen, <a href="http://dx.doi.org/10.1016/S0377-0427(00)00437-4">Computed Lyapunov constants for random recurrences with smooth coefficients</a>, J. Comp. Appl. Math. 132 (2) (2001), 331-340, Table 1.
%e A201506 1.0574735537 ...
%Y A201506 Cf. A078416, A048634, A344388.
%K A201506 cons,nonn
%O A201506 1,3
%A A201506 _R. J. Mathar_, Dec 02 2011