Number of antichains (or order ideals) in the poset B_4 X [n]; or size of the distributive lattice J(B_4 X [n]).
A006363
Number of antichains (or order ideals) in the poset B_4 X [n]; or size of the distributive lattice J(B_4 X [n]).
Terms
- a(0) =1a(1) =168a(2) =7581a(3) =160948a(4) =2068224a(5) =18561984a(6) =127234008a(7) =706987164a(8) =3320153661a(9) =13583619496a(10) =49530070161a(11) =163806121656a(12) =498180781144
External references
- oeis: A006363