T(n,e) is the number of unlabeled posets of n>=0 points with e>=0 arcs in the Hasse diagram, irregular triangle read by rows.
A342447
T(n,e) is the number of unlabeled posets of n>=0 points with e>=0 arcs in the Hasse diagram, irregular triangle read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =1a(8) =1a(9) =4a(10) =8a(11) =2a(12) =1a(13) =1a(14) =4a(15) =11a(16) =29a(17) =12a(18) =5a(19) =1a(20) =1a(21) =4a(22) =12a(23) =43a(24) =105a(25) =92a(26) =45a(27) =12a(28) =3a(29) =1
External references
- oeis: A342447