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 A238223 #28 Aug 31 2024 09:50:17 %S A238223 2,1,7,9,5,0,7,8,9,4,4,7,1,5,1,0,6,5,4,9,2,8,2,2,8,2,2,4,4,2,3,1,9,8, %T A238223 2,0,8,8,6,6,0,4,5,3,9,5,6,2,9,3,9,9,6,3,4,8,1,2,3,4,0,1,7,6,2,6,5,8, %U A238223 7,3,3,6,2,9,2,5,3,7,0,9,4,4,9,1,2,5,9,6,3,2,2,9,8,6,2,2,9,4,5,1,4,4,8,8,9,0 %N A238223 Decimal expansion of a constant related to A088716. %H A238223 Michael Borinsky, Gerald V. Dunne, and Karen Yeats, <a href="https://www.arxiv.org/abs/2408.15883">Tree-tubings and the combinatorics of resurgent Dyson-Schwinger equations</a>, arXiv:2408.15883 [math-ph], 2024. See p. 13. %F A238223 Equals lim n->infinity A088716(n)/(n!*n^2). %e A238223 0.21795078944715106549282282244231982088... %Y A238223 Cf. A088716, A088715, A158884, A159606, A182962, A193332, A156326, A338377. %K A238223 nonn,cons %O A238223 0,1 %A A238223 _Vaclav Kotesovec_, Feb 21 2014