Triangle read by rows: T(n,k) (n>=1, 1 <= k <= n) = number of n-element unlabeled rigid interval posets of height k.

A193357

Triangle read by rows: T(n,k) (n>=1, 1 <= k <= n) = number of n-element unlabeled rigid interval posets of height k.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =0a(7) =1a(8) =3a(9) =1a(10) =0a(11) =1a(12) =8a(13) =6a(14) =1a(15) =0a(16) =1a(17) =20a(18) =29a(19) =10a(20) =1a(21) =0a(22) =1a(23) =51a(24) =128a(25) =75a(26) =15a(27) =1a(28) =0a(29) =1

External references