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 A386934 #22 Sep 02 2025 14:13:44
%S A386934 1,2,8,9,2,6,5,2,3,5,9,8,4,9,1,7,7,2,6,1,5,0,2,4,7,0,4,6,1,0,9,3,8,0,
%T A386934 1,5,8,3,7,4,4,3,5,2,5,7,0,7,8,9,7,4,4,6,1,9,4,7,7,9,0,7,9,3,6,6,1,2,
%U A386934 3,3,9,4,3,4,2,3,9,0,3,0,6,8,2,2,5,6,1,8,9,7,9,8,4,5,9,7,5,2,5,7
%N A386934 Decimal expansion of BesselI(1, 2*sqrt(2))/(sqrt(2)*BesselI(2, 2*sqrt(2))).
%H A386934 Kelvin Voskuijl, <a href="/A386934/b386934.txt">Table of n, a(n) for n = 1..20000</a>
%F A386934 Equals ( Sum_{k >= 0} 2^n/((1 + n)n!^2) )/( Sum_{k >= 1} 2^k/((k-1)!*(k+1)!) ).
%F A386934 Equals A363679/A386710.
%e A386934 1.2892652359849177261502470461093801583744352570790...
%t A386934 RealDigits[BesselI[1, 2 Sqrt[2]]/(Sqrt[2] BesselI[2, 2 Sqrt[2]]), 10, 100][[1]]
%o A386934 (PARI) besseli(1, 2*sqrt(2))/(sqrt(2)*besseli(2, 2*sqrt(2)))
%Y A386934 Cf. A145051 (continued fraction), A363679, A386710.
%K A386934 cons,nonn,changed
%O A386934 1,2
%A A386934 _Kelvin Voskuijl_, Aug 09 2025