Number of North-East lattice paths from (0,0) to (n,n) that have exactly four east steps below the subdiagonal y = x-1.
A268399
Number of North-East lattice paths from (0,0) to (n,n) that have exactly four east steps below the subdiagonal y = x-1.
Terms
- a(0) =14a(1) =70a(2) =286a(3) =1099a(4) =4124a(5) =15327a(6) =56770a(7) =210188a(8) =779076a(9) =2893111a(10) =10767680a(11) =40171225a(12) =150229560a(13) =563151435a(14) =2115877410a(15) =7967261640a(16) =30063189300a(17) =113663662560a(18) =430549220244
External references
- oeis: A268399