a(n) = (-1)^n*b(2n-1,2) where b(n,p) = Sum_{k=0..n} p^k*C(2*k,k)*C(n+k,n-k)*B(k) and B(k) = k-th Bernoulli number.
A095363
a(n) = (-1)^n*b(2n-1,2) where b(n,p) = Sum_{k=0..n} p^k*C(2*k,k)*C(n+k,n-k)*B(k) and B(k) = k-th Bernoulli number.
Terms
- a(0) =1a(1) =9a(2) =225a(3) =12593a(4) =1273185a(5) =203040057a(6) =46870307393
External references
- oeis: A095363