a(n) = Sum_{k=0..n} 2^k * binomial(n,k) * binomial(n+4,k).
A386882
a(n) = Sum_{k=0..n} 2^k * binomial(n,k) * binomial(n+4,k).
Terms
- a(0) =1a(1) =11a(2) =85a(3) =575a(4) =3649a(5) =22363a(6) =134245a(7) =795455a(8) =4673345a(9) =27298155a(10) =158819253a(11) =921406335a(12) =5334940545a(13) =30845044155a(14) =178153920965
External references
- oeis: A386882