Number of 3-element antichains on an unlabeled n-element set; equivalence classes of monotone Boolean functions of n variables with 3 mincuts under action of symmetric group S_n.
A056778
Number of 3-element antichains on an unlabeled n-element set; equivalence classes of monotone Boolean functions of n variables with 3 mincuts under action of symmetric group S_n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =2a(4) =9a(5) =30a(6) =84a(7) =202a(8) =437a(9) =872a(10) =1627a(11) =2874a(12) =4853a(13) =7882a(14) =12383a(15) =18902a(16) =28130a(17) =40934a(18) =58391a(19) =81812a(20) =112790a(21) =153238a(22) =205430a(23) =272054a(24) =356270a(25) =461754a(26) =592774a(27) =754252a(28) =951831a(29) =1191956
External references
- oeis: A056778