a(n) = (2n-1)!!*(Sum_{k=1..n}k/(2*k-1)).
A334066
a(n) = (2n-1)!!*(Sum_{k=1..n}k/(2*k-1)).
Terms
- a(0) =1a(1) =5a(2) =34a(3) =298a(4) =3207a(5) =40947a(6) =605076a(7) =10157220a(8) =190915965a(9) =3971997585a(10) =90613969110
External references
- oeis: A334066