Triangle read by rows: T(n,k) (n>=1, k>=0) is the number of posets with n elements and rank k (or depth k+1).
A263859
Triangle read by rows: T(n,k) (n>=1, k>=0) is the number of posets with n elements and rank k (or depth k+1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =8a(8) =6a(9) =1a(10) =1a(11) =20a(12) =31a(13) =10a(14) =1a(15) =1a(16) =55a(17) =162a(18) =84a(19) =15a(20) =1a(21) =1a(22) =163a(23) =940a(24) =734a(25) =185a(26) =21a(27) =1a(28) =1a(29) =556
External references
- oeis: A263859