a(n) = ((2*n+1)!!)^4 * (Sum_{k=1..n} 1/(2*k+1)^4).
A335092
a(n) = ((2*n+1)!!)^4 * (Sum_{k=1..n} 1/(2*k+1)^4).
Terms
- a(0) =0a(1) =1a(2) =706a(3) =1745731a(4) =11575291716
External references
- oeis: A335092
A335092
a(n) = ((2*n+1)!!)^4 * (Sum_{k=1..n} 1/(2*k+1)^4).