Number of 4-multiantichains of an n-set.

A084871

Number of 4-multiantichains of an n-set.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =41a(4) =398a(5) =6177a(6) =128232a(7) =2881531a(8) =62769238a(9) =1288737197a(10) =25012685732a(11) =463681018671

External references