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 A124016 #7 Apr 27 2023 11:23:27 %S A124016 1,1,2,5,11,28,69,181,474 %N A124016 Number of connected d-complete posets with n elements. %H A124016 Cheryl A. Gann and Robert A. Proctor, <a href="http://lists-of-posets.math.unc.edu/defcnt.html#pstcnts">Poset Counts</a> %H A124016 Robert A. Proctor, <a href="http://www.math.unc.edu/Faculty/rap/DfndC.html">Definition of d-Complete Poset</a> %Y A124016 Cf. A000112, A124480, A124481. %K A124016 more,nonn %O A124016 1,3 %A A124016 _Franklin T. Adams-Watters_, Nov 03 2006