3092808

Appears in sequences

• Antichains (or order ideals) in the poset 2*3*3*n or size of the distributive lattice J(2*3*3*n).at n=4A056935
• Antichains (or order ideals) in the poset 2*3*4*n or size of the distributive lattice J(2*3*4*n).at n=3A056936
• Select all integers from the list (p(k)-k)/tau(k), k>=1; p = A000041, tau = A000005.at n=27A141669