Antichains (or order ideals) in the poset 2*3*3*n or size of the distributive lattice J(2*3*3*n).

A056935

Antichains (or order ideals) in the poset 2*3*3*n or size of the distributive lattice J(2*3*3*n).

Terms

    a(0) =1a(1) =175a(2) =8790a(3) =211250a(4) =3092808a(5) =31635580a(6) =246441430a(7) =1549486490a(8) =8192995479a(9) =37548347569a(10) =152602439244a(11) =559835910940

External references