a(n) = (2*n+1)!*Sum_{k=0..n} B(2*k), B(n) the n-th Bernoulli number.
A260535
a(n) = (2*n+1)!*Sum_{k=0..n} B(2*k), B(n) the n-th Bernoulli number.
Terms
- a(0) =1a(1) =7a(2) =136a(3) =5832a(4) =407808a(5) =47882880a(6) =5893585920
External references
- oeis: A260535