Triangle read by rows: T(n,k) is the number of 4-dimensional balanced ballot paths of 4n steps such that the height is exactly k, 3 <= k <= 3*n.
A387987
Triangle read by rows: T(n,k) is the number of 4-dimensional balanced ballot paths of 4n steps such that the height is exactly k, 3 <= k <= 3*n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =5a(5) =1a(6) =15a(7) =68a(8) =147a(9) =105a(10) =84a(11) =42a(12) =1a(13) =63a(14) =722a(15) =3098a(16) =4720a(17) =5940a(18) =5112a(19) =2520a(20) =1386a(21) =462a(22) =1a(23) =255a(24) =7100a(25) =58130a(26) =157631a(27) =297458a(28) =374568a(29) =306783
External references
- oeis: A387987