T(n,k) is the number of connected posets of n unlabeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.
A342590
T(n,k) is the number of connected posets of n unlabeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =0a(5) =3a(6) =0a(7) =0a(8) =0a(9) =8a(10) =2a(11) =0a(12) =0a(13) =0a(14) =0a(15) =27a(16) =12a(17) =5a(18) =0a(19) =0a(20) =0a(21) =0a(22) =0a(23) =91a(24) =87a(25) =45a(26) =12a(27) =3a(28) =0a(29) =0
External references
- oeis: A342590