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 A246969 #5 Sep 09 2014 01:02:17 %S A246969 1,2,31,1272,105720,15492600,3621844800 %N A246969 Erroneous version of A246970. %C A246969 This is the "connected" version of the problem studied by Read in A001500. Since the terms a(6) and a(7) for A001500 given in his letter (and presumably also in his dissertation) are known to be wrong, it is extremely likely that the values of a(6) and a(7) shown here are also wrong. %D A246969 R. C. Read, Some Enumeration Problems in Graph Theory. Ph.D. Dissertation, Department of Mathematics, Univ. London, 195 %H A246969 R. C. Read, <a href="/A002831/a002831.pdf">Letter to N. J. A. Sloane, Feb 04 1971</a> %K A246969 dead %O A246969 1,2 %A A246969 _N. J. A. Sloane_, Sep 09 2014