A138347 Number of squarefree bipartite graphs on n vertices.
1, 2, 3, 6, 10, 21, 39, 86, 182, 440, 1074, 2941, 8424, 26720, 90883, 340253, 1384567, 6186907, 30219769, 161763233, 946742190, 6054606722, 42229136988, 320741332093, 2648348712904
Offset: 1
Keywords
Links
- CombOS - Combinatorial Object Server, Generate graphs
- B. D. McKay, Isomorph-free exhaustive generation, J Algorithms, 26 (1998) 306-324.
Extensions
More terms from Brendan McKay, Feb 04 2013
One more term from Brendan McKay, Mar 11 2018