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%I M4728 #22 Nov 07 2017 18:15:49
%S 1,10,79,602,4682,38072,326570,2964992,28506383,289973248,3116028865,
%T 35308153600,421048783264,5273818620928,69250997724484,
%U 951571372015616,13658940616055885,204474999700324352,3187421031909630947,51663403849575956480
%N Total preorders.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H G. Kreweras, <a href="http://www.numdam.org/item?id=MSH_1976__53__5_0">Les préordres totaux compatibles avec un ordre partiel</a>, Math. Sci. Humaines No. 53 (1976), 5-30.
%H G. Kreweras, <a href="/A019538/a019538.pdf">Les préordres totaux compatibles avec un ordre partiel</a>, Math. Sci. Humaines No. 53 (1976), 5-30. (Annotated scanned copy)
%Y A diagonal of A079502.
%K nonn
%O 3,2
%A _N. J. A. Sloane_
%E More terms from _Sean A. Irvine_, Mar 12 2017
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