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 A006719 M2328 #15 Jul 08 2025 16:53:32 %S A006719 3,4,6,12,48,924,409620,83763206256,3508125906290858798172, %T A006719 6153473687096578758448522809275077520433168, %U A006719 18932619208894981833333582059033329370801266249535902023330546944758507753065602135844 %N A006719 a(n) = A000905(n) + 1. %C A006719 Related to Hamilton numbers. %D A006719 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %D A006719 J. J. Sylvester, Collected Mathematical Papers, Vols. 1-4, Cambridge Univ. Press, 1904-1912, Vol. 4, p. 551. %H A006719 J. J. Sylvester, The collected mathematical papers of James Joseph Sylvester, <a href="http://www.hti.umich.edu/cgi/t/text/text-idx?sid=b88432273f115fb346725f1a42422e19;c=umhistmath;idno=AAS8085.0002.001">vol. 2</a>, <a href="http://www.hti.umich.edu/cgi/t/text/text-idx?sid=b88432273f115fb346725f1a42422e19;c=umhistmath;idno=AAS8085.0003.001">vol. 3</a>, <a href="http://www.hti.umich.edu/cgi/t/text/text-idx?sid=b88432273f115fb346725f1a42422e19;c=umhistmath;idno=AAS8085.0004.001">vol. 4</a>. %K A006719 nonn %O A006719 1,1 %A A006719 _N. J. A. Sloane_ %E A006719 More terms from _Ralf Stephan_, Aug 05 2004