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 A385453 #8 Jun 30 2025 10:49:17
%S A385453 8,8,1,0,7,9,4,5,0,6,9,1,0,9,2,1,8,9,8,9,0,5,3,7,0,0,5,8,6,7,8,5,7,9,
%T A385453 4,9,3,9,7,4,9,2,0,9,3,1,6,4,8,1,2,7,0,3,3,7,5,4,5,0,0,7,7,3,5,3,0,0,
%U A385453 0,1,3,6,1,8,6,3,2,1,9,7,8,8,3,5,8,4,6,7,3,9,3,9,1,7,9,1,5,7,4,9,7,3,1,6,5
%N A385453 Decimal expansion of 6*Sum_{k>=0} (-1)^k/(k! (k + 3)! 2^k).
%H A385453 Michael I. Shamos, <a href="http://euro.ecom.cmu.edu/people/faculty/mshamos/cat.pdf">A catalog of the real numbers</a>, (2007), p. 614.
%F A385453 Equals Hypergeometric0F1(4, -1/2).
%F A385453 Equals 12 * sqrt(2) * BesselJ(3, sqrt(2)).
%e A385453 0.881079450691092189890537005867857949397...
%t A385453 RealDigits[Hypergeometric0F1[4, -1/2], 10, 105][[1]]
%Y A385453 Cf. A334383.
%K A385453 cons,nonn
%O A385453 0,1
%A A385453 _Artur Jasinski_, Jun 29 2025