4701698

Appears in sequences

• Antichains (or order ideals) in the poset 2*2*3*n or size of the distributive lattice J(2*2*3*n).at n=7A006360
• Antichains (or order ideals) in the poset 2*2*7*n or size of the distributive lattice J(2*2*7*n).at n=3A056934