T(n,k) is the number of posets of n labeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.
A342589
T(n,k) is the number of posets of n labeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =6a(5) =12a(6) =1a(7) =12a(8) =60a(9) =128a(10) =18a(11) =1a(12) =20a(13) =180a(14) =880a(15) =2090a(16) =960a(17) =100a(18) =1a(19) =30a(20) =420a(21) =3480a(22) =17550a(23) =47772a(24) =43920a(25) =15000a(26) =1710a(27) =140a(28) =1a(29) =42
External references
- oeis: A342589