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 A259620 #5 Feb 16 2025 08:33:26
%S A259620 6,4,1,5,6,1,6,3,7,5,7,0,0,2,4,0,2,8,2,8,3,9,8,1,4,7,1,9,0,8,7,9,2,4,
%T A259620 0,3,8,1,0,9,0,0,0,5,6,5,2,0,7,7,2,0,7,7,8,6,7,4,9,4,7,6,2,7,3,2,2,8,
%U A259620 8,0,6,0,3,3,4,7,1,6,6,5,3,2,3,2,4,6,5,3,2,0,8,6,4,6,9,9,5,6,6,8,8,0,6,7,7
%N A259620 Decimal expansion of J'_5(1), the first root of the derivative of the Bessel function J_5.
%H A259620 Eric Weisstein's MathWorld, <a href="https://mathworld.wolfram.com/BesselFunctionZeros.html">Bessel Function Zeros</a>
%e A259620 6.41561637570024028283981471908792403810900056520772077867494762732288...
%t A259620 FindRoot[D[BesselJ[5, x], x] == 0, {x, 6}, WorkingPrecision -> 105] // Last // Last // RealDigits // First
%Y A259620 Cf. A115369 J'_0(1), A259616 J'_1(1), A259617 J'_2(1), A259618 J'_3(1), A259619 J'_4(1).
%K A259620 nonn,cons,easy
%O A259620 1,1
%A A259620 _Jean-François Alcover_, Jul 01 2015