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%I M1893 #17 Oct 27 2023 05:57:59
%S 1,2,8,61,822,17914,571475,24566756,1346167320,90729050427,
%T 7341861588316,700870085606926,77858914606919461,9954018225212149326,
%U 1450980922023874162612
%N Number of labeled interval graphs with n nodes.
%D P. J. Hanlon, personal communication.
%D R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1980.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H R. W. Robinson, <a href="/A005215/b005215.txt">Table of n, a(n) for n = 1..30</a>
%H Phil Hanlon, <a href="http://dx.doi.org/10.1090/S0002-9947-1982-0662044-8">Counting interval graphs</a>, Trans. Amer. Math. Soc. 272 (1982), no. 2, 383-426.
%K nonn
%O 1,2
%A _N. J. A. Sloane_
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