Triangle read by rows in which T(n,k) is the number of length k chains from (0,0) to (n,n) of the poset [n] X [n] ordered by the product order, 0 <= k <= 2n, n>=0.
A316649
Triangle read by rows in which T(n,k) is the number of length k chains from (0,0) to (n,n) of the poset [n] X [n] ordered by the product order, 0 <= k <= 2n, n>=0.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =2a(4) =0a(5) =1a(6) =7a(7) =12a(8) =6a(9) =0a(10) =1a(11) =14a(12) =55a(13) =92a(14) =70a(15) =20a(16) =0a(17) =1a(18) =23a(19) =153a(20) =471a(21) =780a(22) =720a(23) =350a(24) =70a(25) =0a(26) =1a(27) =34a(28) =336a(29) =1584
External references
- oeis: A316649