Central terms of triangle A123610: a(n) = A123610(2*n,n).
A123617
Central terms of triangle A123610: a(n) = A123610(2*n,n).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =68a(4) =618a(5) =6352a(6) =71188a(7) =841332a(8) =10352618a(9) =131328068a(10) =1706742160a(11) =22619741212a(12) =304685855700
External references
- oeis: A123617