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 A092148 #17 Aug 26 2024 02:05:41
%S A092148 1,0,3,11,85,739,7831,96641,1363209,21632759,381433771,7398080029,
%T A092148 156533563693,3588046200179,88571349871551,2342565398442569,
%U A092148 66087436823953681,1980956920420309231,62871632567144951635,2106277265332074827573,74276723394195659799861
%N A092148 Expansion of e.g.f. 1/(exp(x)-x*exp(2*x)).
%F A092148 a(n) = n! * Sum_{k=0..n} (n-k-1)^k/k!. [Corrected by _Georg Fischer_, Jun 22 2022]
%F A092148 a(n) ~ n! / ((LambertW(1) + 1) * LambertW(1)^(n-1)). - _Vaclav Kotesovec_, Jun 22 2022
%t A092148 With[{nn=20},CoefficientList[Series[1/(Exp[x]-x Exp[2x]),{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Sep 19 2020 *)
%o A092148 (PARI) a(n)=n!*sum(k=0,n,(n-k-1)^k/k!)
%Y A092148 Cf. A006153, A072597.
%K A092148 nonn
%O A092148 0,3
%A A092148 _Ralf Stephan_, Mar 31 2004
%E A092148 Corrected and extended by _Harvey P. Dale_, Sep 19 2020