A300749 - OEIS

%I #18 Jan 02 2023 12:30:54

%S 1,1,1,2,3,7,12,30,64,177,457,1403,4327,15024,54730,219311,942908,

%T 4426513,22525015,124896794,752933593,4938212176,35190683416,

%U 272266028155,2284292635109

%N Number of connected squarefree bipartite graphs on n vertices.

%H CombOS - Combinatorial Object Server, <a href="http://combos.org/nauty">Generate graphs</a>

%H Brendan McKay, <a href="http://list.seqfan.eu/oldermail/seqfan/2018-March/018436.html">Inverse Euler transforms needed</a>, message on the SeqFan list, Mar 12 2018.

%F Inverse Euler transform of A138347.

%Y Cf. A138347.

%K nonn,more

%O 1,4

%A _Alois P. Heinz_, Mar 11 2018.