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 A058164 #13 Jul 22 2025 04:14:30
%S A058164 1,1,2,9,76,1065,22566,674611,27019896,1393871121,89805306250,
%T A058164 7051089328371,661327038073428,72882388902988561,9308502142507505406,
%U A058164 1361778362223282167235,225917426273413368357616,42135305039539420956486369,8768279861975723002123310226
%N A058164 Number of labeled lattices with a fixed bottom.
%F A058164 a(n) = A055512(n)/n = A058165(n)*(n-1).
%t A058164 A055512 = Cases[Import["https://oeis.org/A055512/b055512.txt", "Table"], {_, _}][[All, 2]];
%t A058164 a[n_] := A055512[[n + 1]]/n;
%t A058164 a /@ Range[18] (* _Jean-François Alcover_, Jan 02 2020 *)
%Y A058164 Main diagonal of A058160.
%Y A058164 Cf. A055512, A058165.
%K A058164 nonn,hard
%O A058164 1,3
%A A058164 _Christian G. Bower_, Nov 15 2000
%E A058164 a(18) from _Jean-François Alcover_, Jan 02 2020
%E A058164 a(19) from the data at A055512 added by _Amiram Eldar_, Jul 22 2025