a(n) = ((2*n+1)!!)^n * (Sum_{k=1..n} 1/(2*k+1)^n).
A335096
a(n) = ((2*n+1)!!)^n * (Sum_{k=1..n} 1/(2*k+1)^n).
Terms
- a(0) =0a(1) =1a(2) =34a(3) =55511a(4) =11575291716
External references
- oeis: A335096
A335096
a(n) = ((2*n+1)!!)^n * (Sum_{k=1..n} 1/(2*k+1)^n).