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 A127120 #5 Feb 21 2020 17:05:36
%S A127120 1,3,12,41,140,457,1485,4732,14986,47025,146784,455683,1409122,
%T A127120 4341456,13336440,40858875,124894889,380993722,1160145321,3527008680,
%U A127120 10707133507,32461710583,98300107420,297348593017,898559807247,2712889137261,8183743165156,24668014337837
%N A127120 Column limit of A127119.
%C A127120 Number of endofunctions on a set with m+n elements, where the maximum indegree is m, when m > n. Increasing m just adds additional points with empty preimage that map to the unique element with indegree m.
%o A127120 (PARI) \\ Needs F from A127119.
%o A127120 seq(n)={my(m=2*n-1); Vecrev(F(m)[m,n..m])} \\ _Andrew Howroyd_, Feb 21 2020
%Y A127120 Cf. A001372, A127119, A127122.
%K A127120 nonn
%O A127120 0,2
%A A127120 _Franklin T. Adams-Watters_, Jan 05 2007
%E A127120 Terms a(5) and beyond from _Andrew Howroyd_, Feb 21 2020