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 A387194 #12 Aug 21 2025 11:15:13 %S A387194 4,7,2,0,0,1,2,1,5,7,6,8,2,3,4,7,6,7,4,4,7,6,6,8,3,8,7,8,7,2,5,0,0,9, %T A387194 6,2,3,6,4,2,4,0,4,4,8,0,4,7,6,6,6,5,8,5,6,4,5,7,3,6,4,7,4,7,7,4,5,9, %U A387194 4,6,1,7,6,2,7,6,2,5,1,2,7,7,0,1,5,1,7,0,4,6,1,9,8,6,2,1,6,7,5,9,4,2,6,1,1,4,0,9,5,5,0,6,0,1,7,5,0,0 %N A387194 Decimal expansion of J_0(Pi/2), Bessel Function of the first kind of index 0 at A019669. %H A387194 Paolo Xausa, <a href="/A387194/b387194.txt">Table of n, a(n) for n = 0..10000</a> %e A387194 J_0(Pi/2) = 0.47200121576823476744766838787250096236424044804766658... %t A387194 First[RealDigits[BesselJ[0, Pi/2], 10, 100]] (* _Paolo Xausa_, Aug 21 2025 *) %Y A387194 Cf. A019669, A387193, A387195. %K A387194 nonn,cons,easy %O A387194 0,1 %A A387194 _R. J. Mathar_, Aug 21 2025