%I #6 Nov 17 2024 21:11:26

%S 1,1,1,2,4,9,23,65,197,636,2171,7756,28822,110805

%N Number of unlabeled join-semidistributive lattices with n elements.

%C Equivalently, a(n) is the number of meet-semidistributive lattices with n elements.

%C The smallest join-semidistributive lattice that is not meet-semidistributive has 7 elements.

%Y Cf. A377408 (semidistributive lattices), A006982 (distributive lattices).

%K nonn,more

%O 1,4

%A _Ludovic Schwob_, Oct 27 2024