a(n) = -1 + Sum_{i=1..n} Sum_{j=1..n} i^j.
A124403
a(n) = -1 + Sum_{i=1..n} Sum_{j=1..n} i^j.
Terms
- a(0) =0a(1) =7a(2) =55a(3) =493a(4) =5698a(5) =82199a(6) =1419759a(7) =28501115a(8) =651233660a(9) =16676686695a(10) =472883843991
External references
- oeis: A124403