530962446

Appears in sequences

• Antichains (or order ideals) in the poset 2*2*5*n or size of the distributive lattice J(2*2*5*n).at n=6A006362
• Antichains (or order ideals) in the poset 2*2*6*n or size of the distributive lattice J(2*2*6*n).at n=5A056933