a(n) = Sum_{k=0..n} 5^k * 2^(n-k) * binomial(3*n+k-1,k).
A386768
a(n) = Sum_{k=0..n} 5^k * 2^(n-k) * binomial(3*n+k-1,k).
Terms
- a(0) =1a(1) =17a(2) =589a(3) =23063a(4) =952421a(5) =40527732a(6) =1758058219a(7) =77293019898
External references
- oeis: A386768