a(n) = Sum_{k=0..n} binomial(k+n-1,k)*binomial(k+n,2*k).
A262910
a(n) = Sum_{k=0..n} binomial(k+n-1,k)*binomial(k+n,2*k).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =59a(4) =366a(5) =2337a(6) =15205a(7) =100235a(8) =667222a(9) =4474733a(10) =30188335a(11) =204646532a(12) =1392850785a(13) =9511878729a(14) =65144238981a(15) =447263887479
External references
- oeis: A262910