a(n) = ((2n-1)!!)^4 * Sum_{i=1..n} 1/(2*i-1)^4.
A291586
a(n) = ((2n-1)!!)^4 * Sum_{i=1..n} 1/(2*i-1)^4.
Terms
- a(0) =0a(1) =1a(2) =82a(3) =51331a(4) =123296356a(5) =809068942341
External references
- oeis: A291586
A291586
a(n) = ((2n-1)!!)^4 * Sum_{i=1..n} 1/(2*i-1)^4.