a(n) is the constant term in the expansion of ( Sum_{k=1..n} x_k^(2*k-1) + x_k^(-(2*k-1)) )^(2*n).
A329021
a(n) is the constant term in the expansion of ( Sum_{k=1..n} x_k^(2*k-1) + x_k^(-(2*k-1)) )^(2*n).
Terms
- a(0) =1a(1) =2a(2) =44a(3) =4332a(4) =1012664a(5) =432457640a(6) =293661065788
External references
- oeis: A329021