a(n) = Sum_{k=0..n} 5^k * 2^(n-k) * binomial(n+k-1,k).
A386766
a(n) = Sum_{k=0..n} 5^k * 2^(n-k) * binomial(n+k-1,k).
Terms
- a(0) =1a(1) =7a(2) =99a(3) =1618a(4) =28051a(5) =502182a(6) =9174174a(7) =169955268a(8) =3180814851a(9) =59997194782
External references
- oeis: A386766