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 A371748 #13 Sep 03 2025 13:54:13
%S A371748 2,7,1,1,8,1,9,3,4,7,7,2,6,9,5,8,7,6,0,6,9,1,0,8,8,4,6,9,7,0,7,9,1,8,
%T A371748 6,0,2,4,4,3,3,9,9,0,8,5,6,7,4,8,8,5,4,9,4,6,9,3,0,8,0,6,2,9,0,0,6,0,
%U A371748 2,6,2,3,6,1,3,0,5,9,7,7,8,0,0,9,7,8,7,7,4,0,5,2,5,2,1,4,6,0,4,6
%N A371748 Decimal expansion of Product_{k>=0} (1 + 1/4^k).
%H A371748 Kelvin Voskuijl, <a href="/A371748/b371748.txt">Table of n, a(n) for n = 1..20000</a>
%F A371748 Equals A065445^2. - _Hugo Pfoertner_, Apr 05 2024
%e A371748 2.71181934772695876069108846970791860244...
%t A371748 RealDigits[QPochhammer[-1, 1/4], 10, 100][[1]]
%Y A371748 Cf. A000302, A065445, A081845, A100221, A132323, A371747, A371749, A371751.
%K A371748 nonn,cons,changed
%O A371748 1,1
%A A371748 _Ilya Gutkovskiy_, Apr 05 2024