a(n) = denominator of sum_{k=1..n} k^(-4).
A007480
a(n) = denominator of sum_{k=1..n} k^(-4).
Terms
- a(0) =1a(1) =16a(2) =1296a(3) =20736a(4) =12960000a(5) =12960000a(6) =31116960000a(7) =497871360000
External references
- oeis: A007480
A007480
a(n) = denominator of sum_{k=1..n} k^(-4).