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 A210689 #13 Oct 12 2017 04:19:30 %S A210689 1,3,9,32,137 %N A210689 Erroneous version of A129416. %D A210689 Cadogan, C. C. Graph-lattices and the enumeration of linear graphs. 1970 Proc. Louisiana Conf. on Combinatorics, Graph Theory and Computing (Louisiana State Univ., Baton Rouge, La., 1970) pp. 61--86 Louisiana State Univ., Baton Rouge, La. MR0269553 (42 #4448). %K A210689 dead %O A210689 1,2 %A A210689 _N. J. A. Sloane_, Mar 30 2012