a(n) = 1 + Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} i^(j+k).
A133298
a(n) = 1 + Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} i^(j+k).
Terms
- a(0) =2a(1) =41a(2) =1727a(3) =130917a(4) =17245160a(5) =3546873073
External references
- oeis: A133298
A133298
a(n) = 1 + Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} i^(j+k).