Number of connected 4-element antichains on a labeled n-set.

A094035

Number of connected 4-element antichains on a labeled n-set.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =20a(5) =1655a(6) =65305a(7) =1794730a(8) =40179930a(9) =793030245a(10) =14423331635a(11) =248261291960

External references