a(n) = Sum_{k=0..n} binomial(n,k) * binomial(5*n+k,k).
A359646
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(5*n+k,k).
Terms
- a(0) =1a(1) =7a(2) =89a(3) =1273a(4) =19181a(5) =297662a(6) =4707971a(7) =75459496a(8) =1221388525a(9) =19919031781a(10) =326797222834
External references
- oeis: A359646