a(n) = ((2n-1)!!)^5 * Sum_{i=1..n} 1/(2*i-1)^5.
A291587
a(n) = ((2n-1)!!)^5 * Sum_{i=1..n} 1/(2*i-1)^5.
Terms
- a(0) =0a(1) =1a(2) =244a(3) =762743a(4) =12820180976
External references
- oeis: A291587
A291587
a(n) = ((2n-1)!!)^5 * Sum_{i=1..n} 1/(2*i-1)^5.