a(n) = (1/10) * Sum_{k=0..n-1} binomial(10*n,10*k+1).
A387753
a(n) = (1/10) * Sum_{k=0..n-1} binomial(10*n,10*k+1).
Terms
- a(0) =0a(1) =1a(2) =16798a(3) =6893448a(4) =13386764876
External references
- oeis: A387753
A387753
a(n) = (1/10) * Sum_{k=0..n-1} binomial(10*n,10*k+1).