T(n,k) is the number of labeled connected posets of n labeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.
A342588
T(n,k) is the number of labeled connected posets of n labeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =0a(4) =0a(5) =12a(6) =0a(7) =0a(8) =0a(9) =128a(10) =18a(11) =0a(12) =0a(13) =0a(14) =0a(15) =2000a(16) =960a(17) =100a(18) =0a(19) =0a(20) =0a(21) =0a(22) =0a(23) =41472a(24) =43320a(25) =15000a(26) =1710a(27) =140a(28) =0a(29) =0
External references
- oeis: A342588