Sum_{k=0..n} ((k+1)*binomial(n+1,k)*binomial(2*n-k,n))/(n+1).
A262607
Sum_{k=0..n} ((k+1)*binomial(n+1,k)*binomial(2*n-k,n))/(n+1).
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =219a(5) =1075a(6) =5459a(7) =28383a(8) =150131a(9) =804515a(10) =4355163a(11) =23768079a(12) =130572363a(13) =721247571a(14) =4002344355a(15) =22296869823a(16) =124633584099a(17) =698707769923
External references
- oeis: A262607