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 A009283 #24 Dec 16 2022 12:13:39
%S A009283 1,2,4,9,24,73,246,913,3688,16057,74954,372749,1965156,10942285,
%T A009283 64103006,393902353,2532010800,16982676561,118600412626,860680689429,
%U A009283 6478753957948,50505684285301,407133297257542,3389160344023385,29098108436107592,257364794368638009
%N A009283 E.g.f.: exp(x + sinh(x)).
%F A009283 a(0) = 1; a(n) = a(n-1) + Sum_{k=0..floor((n-1)/2)} binomial(n-1,2*k) * a(n-2*k-1). - _Ilya Gutkovskiy_, Apr 10 2022
%t A009283 With[{nn=30},CoefficientList[Series[Exp[x+Sinh[x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Dec 16 2022 *)
%o A009283 (PARI) x='x+O('x^66); Vec(serlaplace(exp(x + sinh(x)))) /* _Joerg Arndt_, Sep 01 2012 */
%Y A009283 Cf. A003724, A009227, A009282.
%K A009283 nonn,easy
%O A009283 0,2
%A A009283 _R. H. Hardin_
%E A009283 Extended and signs tested by _Olivier Gérard_, Mar 15 1997
%E A009283 Name corrected by _Arkadiusz Wesolowski_, Sep 01 2012