a(n) = Sum_{i=1..n-1} (i^4 * a(i)), a(1)=1.
A256020
a(n) = Sum_{i=1..n-1} (i^4 * a(i)), a(1)=1.
Terms
- a(0) =1a(1) =1a(2) =17a(3) =1394a(4) =358258a(5) =224269508a(6) =290877551876
External references
- oeis: A256020
A256020
a(n) = Sum_{i=1..n-1} (i^4 * a(i)), a(1)=1.