Antichains (or order ideals) in the poset 2*2*4*n or size of the distributive lattice J(2*2*4*n).
A006361
Antichains (or order ideals) in the poset 2*2*4*n or size of the distributive lattice J(2*2*4*n).
Terms
- a(0) =1a(1) =105a(2) =3490a(3) =59542a(4) =650644a(5) =5157098a(6) =32046856a(7) =164489084a(8) =723509159a(9) =2801747767a(10) =9748942554a(11) =30967306114a(12) =90930233726a(13) =249319296218a(14) =643622467414
External references
- oeis: A006361