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 A292828 #8 Feb 16 2025 08:33:51
%S A292828 1,0,4,3,2,9,8,2,6,2,6,4,4,6,8,7,0,1,2,5,2,7,8,7,5,6,8,8,8,1,5,5,9,1,
%T A292828 4,5,6,1,0,3,3,1,1,2,0,9,9,9,8,7,5,2,6,4,5,7,4,1,4,7,7,2,8,9,4,7,0,4,
%U A292828 7,2,0,1,8,1,9,1,0,0,5,2,5,6,2,1,0,9,2,2,9,7,5,7,8,4,2,7,6,2,7,1,7,9,7,4,3
%N A292828 Decimal expansion of Product_{k>=1} (1 + exp(-Pi*(2*k-1))).
%D A292828 A. P. Prudnikov, Yu. A. Brychkov, and O. I. Marichev, Integrals and Series, Vol. 1 (Overseas Publishers Association, Amsterdam, 1986), p. 757, section 6.2.3, formula 5.
%H A292828 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/InfiniteProduct.html">Infinite Product</a>, formula 50.
%F A292828 Equals 2^(1/4) * exp(-Pi/24).
%F A292828 Equals A292820 / A292821.
%e A292828 1.043298262644687012527875688815591456103311209998752645741477289470472...
%t A292828 RealDigits[2^(1/4) * E^(-Pi/24), 10, 120][[1]]
%Y A292828 Cf. A259148, A292820, A292824.
%Y A292828 Cf. A292827, A292829.
%K A292828 nonn,cons
%O A292828 1,3
%A A292828 _Vaclav Kotesovec_, Sep 24 2017