|
%I #13 Apr 01 2022 17:28:21
%S 1,2,8,54,548,7984,163440,4599908,174204728,8721120744,568964631296,
%T 47787888342520,5112015062311008,689824902243337856,
%U 116423739687724785152,24387469030487505651984,6296486009090647137387200,1991072810881504185092485408
%N Number of labeled simple graphs on n vertices without cycles of length 4.
%H <a href="/index/Sq#square_free">Index entries for sequences of squarefree graphs</a>
%Y EXP transform of A345248. Row sums of A352472.
%Y A006786 counts isomorphism classes.
%Y Cf. A213434, A352258 (loops allowed).
%K nonn,hard
%O 1,2
%A _Brendan McKay_, Jun 12 2021
|
