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 A058165 #14 May 24 2025 10:33:48
%S A058165 1,1,3,19,213,3761,96373,3377487,154874569,8980530625,641008120761,
%T A058165 55110586506119,5606337607922197,664893010179107529,
%U A058165 90785224148218811149,14119839142088335522351,2478547355267024762146257
%N A058165 Number of labeled lattices with a fixed bottom and top.
%F A058165 a(n) = A055512(n)/(n*(n-1)) = A058164(n)/(n-1).
%t A058165 A055512 = Cases[Import["https://oeis.org/A055512/b055512.txt", "Table"], {_, _}][[All, 2]];
%t A058165 a[n_] := A055512[[n+1]]/(n(n-1));
%t A058165 a /@ Range[2, 18] (* _Jean-François Alcover_, Jan 02 2020 *)
%Y A058165 Cf. A055512, A058164.
%K A058165 nonn,hard,more
%O A058165 2,3
%A A058165 _Christian G. Bower_, Nov 15 2000
%E A058165 a(18) from _Jean-François Alcover_, Jan 02 2020